My objection to all this stuff is the requirement to share government ID / biometrics / credit card info etc with arbitrary third party sites, their 228 partners who value my privacy and need all my data for legitimate interest, and whatever criminals any of those leak everything to, and also give the government an easily searchable history of what I read when those sites propagate the info back.

Any scheme that doesn’t require this won’t get pushback from me.

As an alternative: I already have government-issued ID and that branch of government already has my private info; have it give me a cryptographic token I can use to prove my age bracket to the root of trust module in my computer; then allow the OS to state my age to third parties when it needs to with a protocol that proves it has seen the appropriate government token but reveals nothing else about my identity.

Other alternatives are possible.