I take your point, but it's extremely foolish to think that ensured compliance won't be sought when it's technologically feasible.
Its already illegal to show adult material to minors. If they were about enforcing laws properly they'd just do that. For instance a court ruling that adult material isnt allowed on the internet, since you can't effectively ID visitors.
Anyone could just make a fake ID though, so what did they do? Make creating fake IDs a crime. If we can lie about our age to the OS, they'll make it illegal to do that as well.
This is an obvious move to reduce computing freedom.
Is it technologically feasible to ensure compliance with the ADA?
No. Not without upending innumerable precedents, laws, and norms in the US, or optionally, bankrupting it.
But you think they'll do it for over 18 just because they can and it's easy to do?
Yes. Because it isn't any of those 3. It's not in contravention of any long standing norm (just since the popularization of the internet), law, or long standing precedent.
And because it gives multiple groups extreme power and influence over many things.
And because those groups clearly crave that power and influence.
The internet is the new public sphere and forum, and it should not be possible except through legal judgement to bar or hinder anyone from accessing it.
If necessary, create private gated networks for adult material.
Anyway. You're clearly entrenched for some reason, so I won't waste my good faith effort any more.
Why does screen readers cause those things but age verification doesn't?