These discussions remind me so much of the US discussions about federal ID documents as verification.

There's a vocal portion of people which opposes any solution because "privacy, government overreach, surveillance ...". So instead of a solution like e.g. zero-proof age verification, that tries to minimize intrusions on privacy, the result is the worst of all worlds, maximum surveillance (but I guess it's ok if it is not the federal government, but meta), with minimum utility. Just look at the freaking mess that is trying to proof your identity in the US.

Please explain how opposition to privacy invasive solutions result in even more privacy invasive solutions being implemented? Is it purely out of spite from the lawmakers? This logic doesn't follow.
Because we’re currently still in the phase where lawmakers are telling tech companies “please find a solution for this issue.” At some point, as has happened in the past with other issues, this will change to “solve this issue, here’s exactly how you have to do it.”
It’s obviously worse for your privacy to have third parties handle full images of your drivers license or video of your entire face, which can then be leaked, rather than using a zero knowledge proof that only sends e.g. a birth year. And no, it’s not spite, it’s incoherence. Lawmakers are single minded seekers of re-election to a first degree approximation and will do things to get votes, even if those things don’t logically make sense together, such as requiring age verification without providing the tools for companies to abide by the law themselves.
US lawmakers are single-minded seekers of lobbying and insider trading money, they will sign and trade on whatever ALEC hands them so they receive more money.
The logic not flowing is the point. People against a federal ID say it is government overreach into state's rights. They consider it the feds invading citizen's rights. They have no need, as it is the purview of the states. So in lieu of a federal ID, private companies are coming up with privacy invading techniques to attempt to verify age. How would one be okay with a private company's invasion of privacy yet not the government's? An invasion of privacy is an invasion of privacy regardless of the one doing the invading.

> An invasion of privacy is an invasion of privacy regardless of the one doing the invading.

Technically, yes, but one party (e.g. USGOV) has many more strands that it can weave together into a larger coherent picture than the other (e.g. Meta).

Also one party has guns and an almost blanket immunity to using them on people it deems it does not like via its privacy violations.

That probably tips the scales for some people.

>”How would one be okay with a private company's invasion of privacy yet not the government's? An invasion of privacy is an invasion of privacy regardless of the one doing the invading.”

‘Invasion’ is doing a lot of work in your comment, and I don’t think there is a clear and widely agreed upon definition of what constitutes an ‘invasion of privacy’. If you have such a definition, please do share it.

Ignoring the reality that some system of age (and ID verification, for certain tasks) system is desired by a significant portion of the population, and does have utility (despite the shouts for "just parent your children") is simply sticking your head in the sand. So by opposing any solution (even solutions that preserve privacy, like zero-knowledge), you make privacy concerns seem unreasonable and weaken stances opposing the more privacy invasive solutions.

> Ignoring the reality that some system of age ... system is desired by a significant portion of the population

How do you think this came to be?

I'm not sure. It dates back hundreds of years, since children weren't allowed in bars

Do you have a source for that? Does your source imply that this is desired by the population?

My question is mostly rhetorical: it is obvious that government & safety institutions are themselves fanning the flames of this ridiculous movement away from privacy and towards a surveillance state of over-protectionism. The world has not significantly changed in 50 years in terms of terrorist threats, (except for, ironically, threats to your identity online), yet suddenly now that we can track people online, we must to combat this non-changing threat factor? It's all security theater.

All intelligence agencies benefit from more data, and will happily use lack of data as a scapegoat for their own incompetence. They instill fear to justify their existence, unlawful behavior, and lack of results.