Wikipedia has a known set of ideological bias

If “holotropic breathwork can be dangerous” is bias, then everyone else seems “biased” as well.

I did a DDG search for “holotropic breathwork” and looked at the first 5 (actually 6 because one wouldn’t load) links for references to hand and face cramping and to any dangerous effects:

• “If not done carefully, holotropic breathing can cause reduced carbon dioxide and other alterations in blood chemistry that can lead to dizziness, fainting, weakness, spasms of the hands and feet, and even seizures.” “For anyone considering trying holotropic breathing, it is a good idea to discuss possible risks with your healthcare provider before embarking on this alternative practice, especially if you have any of the following conditions: [long list that I’ll omit]”. The “if not done carefully” if taken out of context seems at first perhaps to support your take that it’s only dangerous if done wrong. But the second quote I gave makes it clear that even “doing it right” if you have, say, seizures or heart disease is in fact “doing it wrong”. I.e. it’s dangerous for some individuals. (Such as Michael Pollan who has a history of heart disease.)
• <page wouldn’t load for me>
• “Talk to your doctor before attending if you have: [list omitted]”
• “The physiological effects—tingling, temporary muscle cramping—resolve when normal breathing resumes. Certain conditions (cardiovascular disease, seizure history, pregnancy, among others) require medical consultation first.”
• “This practice is not recommended for individuals with: Heart conditions… Neurological disorders… Severe mental health conditions… Pregnancy” Doesn’t mention hand/face cramping.
• “You’ll want to avoid this type of breathwork if you have a history of: Cardiovascular issues, high blood pressure…”. Also doesn’t mention hand/face cramping.

If your take is that it’s always safe for everyone “if done correctly”, then your take is the outlier, not mine.

…holotropic breathwork specifically as uniquely dangerous as compared to any other kind of breathwork…

I never said anything about whether other kinds of breathwork are or aren’t (sometimes, comparatively) dangerous.

…don’t single out one narrow practice…

If I said “boxing carries a risk of concussion”, would you say I was “singling it out” from among other sports that also carry a risk of concussion? (MMA, American football, etc.) I’m not singling anything out. I said nothing about whether ther other forms of breathwork carry risks or not. I’m only “singling out” doing holotropic breathwork from (all else being equal) not doing holotropic breathwork.

…based on one experience you had…

Read more carefully. I never said I believed holotropic breathwork to be dangerous in some cases from my own experience. I said quite the opposite. My own experience didn’t harm me. Taken in isolation, my own experience supports your assertion that it’s safe (though taken in isolation, it’s only an anecdote, so hardly conclusive proof that it’s safe for everyone). I believed holotropic breathwork to be potentially dangerous in some cases before my own experiment and before reading How to Change Your Mind. Neither of those were what convinced me. The preponderance of writings I’d found on the topic did and continue to.

Speaking of which, you’ll notice that Michael Pollin says that it’s CO2 levels in the blood, not holotropic breathwork specifically…

Michael Pollan (whose name you keep misspelling) did specifically call the practice he’d been led in “holotropic breathwork” in the passage I quoted.

And so does Ketoacidosis - the keto diet…

The keto diet causing ketoacidosis is not typical. The keto diet (purposefully) causes “ketosis”, but that’s distinct from ketoacidosis. Ketosis doesn’t alter blood pH. Wikipedia: “While ketosis refers to any elevation of blood ketones, ketoacidosis is a specific pathologic condition that results in changes in blood pH and requires medical attention.”.

…so had his experiment been about the keto diet, he would have had the same results.

If he had risk factors for the keto diet putting him in ketoacidosis, maybe. The keto diet can be dangerous in some cases. “Doing it right” is only safe if “doing it right” includes taking into account any risk factors one might have and being open to abstaining if the risk is too high. (And even then, the risk would never be zero.) Which is exactly what I’ve been saying about holotropic breathwork. Michael Pollan had exactly some of the risk factors which could make holotropic breathwork dangerous for him. Whether he has additional risk factors that would contraindicate the keto diet for him, I don’t know, nor do I know if his heart condition would specifically contraindicate the keto diet absent other conditions.

But if you’re running into negative experiences…

Again, you’re reading what I said and making up your own interpretation exactly contrary to what I said. I never said I had a negative experience beyond being “scared” and “weirded out” enough to end the experiment. (Mind you, I knew to expect the hand/face cramping as it had been mentioned in a lot of material that I had read on the topic.) I didn’t have any of the sort of “theraputic” effects that are the reason why people who seek holotropic breathwork seek it. But again, nothing negative came of the experience.

…what was the difference between what you did and the people that have a lovely time?

Again, my best guess is “I might have gotten into more of that territory had I kept going longer”.

And you can’t really call a guy that wrote This if Your Mind on Plants and takes mescaline and goes off caffeine as not willing to try anything.

Sure. I’ll concede the point. I’m not sure what that has to do with the rest of the conversation, though.

…you should say just “some breathwork has potential dangers.”

That’s exactly what I’ve been saying across three comments now.

If you jump in a pool and to pranayama and breath retention and pass out, you can drown. Which was in Scott Carney’s book about Wim Hof. Not ideal, right? Yet, not holotropic, either. Second, eating a sandwich can lead to choking and death. Eating shellfish can lead to negative reactions and death. Eating too many eggs can lead to death.

Just in: things that aren’t holotropic breathwork can be dangerous in some cases, ergo holotropic breathwork isn’t.

I’m asking you to be specific and look at what you’re calling dangerous and why. Take a step back and be objective and specific.

I have been. You just don’t seem to comprehend written English.