You write "developers have no self control." This isn't a technical problem as much as it is a political/social problem, and it's what will happen in the social/governmental relations part of the business, not what the developers want.

Look what happened to geographical names. Windows still doesn't implement flag emojis because they can't sort out countries.

This sounds more like the exact opposite of your Windows example (I don't run Windows so have to take your word on this). The opposite because Apple have implemented different rules for different countries already whereas your example is about how Microsoft was scared to. So, if anything, your example demonstrates my point about the need for a single toggle to disable everything ;)

It's insane to me that people would argue "we don't know when to stop so lets not implement it at all" when you can literally just stop at one toggle if you wanted. It honestly feels like sometimes people look for problems where problems don't exist.