Porn has changed so much in a fairly short space of time, and it's that normalisation of ever more extreme acts - including so-called breath play - that increases the risk of harm to women and girls, especially younger women and girls just starting to dip their toe into the arena of being sexually active. What a PP said above about boys seeing extreme sex acts before ever having so much as touched a girl is so accurate. Anal, choking, rough deep throating are staples on Pornhub and the like. It must be hard not to take away the message that this is how sex is supposed to be. And now tweets like this, instead of taking the opportunity to do some good by saying something like "ignore the false impression porn gives you, choking is decidedly risky so best not, eh", are further normalising it with its "don't you even know the basics? You don't choke like that, obviously you choke like this, doofus" vibe with that underlying message that choking is just so common and widespread and expected.
I say all that as someone who enjoys being submissive in bed. For me sub play is an expression of ultimate trust in my DH, and part of that trust is knowing he could hurt me but he never would or does, beyond the very mild parameters we have agreed between us (I'm not really into S&M so it's not about pain, our play manifests itself in other ways). I would never, ever mess around with so-called breath play. There is just too much that can go wrong, I could not guarantee having control of my faculties to tap out if something started to go wrong and by the time he realised it could be too late. And because I love him, I don't want to place him in the position of having to live with himself after having inadvertently caused me serious, and completely avoidable, harm just for the sake of a slightly more intense orgasm.