I'm on Android and I use "one sec" with "In app distractions" enabled for YouTube. no idea how it works but when I click on the shorts tab or any shorts in my feed (in the app, not website), it immediately gets blocked by a heroic looking polar bear saying "No shorts for you!". I believe it can block some other in app stuff like reels in instagram as well

I'm guessing they mean that comments shouldn't be allowed everywhere, not that they shouldn't be allowed at all? i.e. CSS lets you put comments in many more places than HTML, in such a way that it's hard to practically impossible to represent in an AST? At least that's how I read it