> the presence of this kind of technology makes it easier for governments to say things like "all ___ content online must be restricted to ages 18+ or 21+" and actually have a way to implement that across Discord and TikTok and gaming chatrooms and everything inbetween

There will still be sites that don’t GAF. Given the damage social media has done to our polity, particularly our youth, I’m all for age gating these services at a fundamental level.