> i.e. this doesn't require age verification at all, just a user profile age property
This is usually how they do it though. First make a dumb law with poor enforcement. People don't push back about it because it obviously won't be enforced. Wait a bit, then say "people are flagrantly violating this law, we need better enforcement". At that point it's a lot harder to say "it shouldn't be a law at all!" because nobody complained when it was brought into law.
Uh, your slippery slope argument ignores the part where websites, discord, british things, etc are literally already trying to require facial pictures, license scans, even videos of your body.
This is considerably better than all of those.
Isn’t it more of a reflection of the current law? Age gates have long been self service (e.g., “enter your birthday”), and we have laws on the books for quite some time barring minors.
There is certainly a risk of what you’re describing with KYC tech that coming online, but I don’t know if that means it will happen.
To play devils advocate; It’s a reasonable demand from parents to control what their children are exposed to. This seems to support that.