> I also acknowledge that there is a reasonable debate to be had if the disadvantages to adults and businesses from imposing these rules are worth the harms prevented
Nobody on the "we need age verification" side wants a debate. They want to run face first in to dumb legislation giving governments and companies even more power to track every movement and know exactly who you are.
Of course, YMMV.
That said, if such a nanny state is inevitable: zero-knowledge-proof-based age verification would not only be possible, it would further protect these kids from a bad state actor. In that spirit, I agree with your last point. The fact that any other alternatives are even being considered makes it on principle a non-starter to me, because it betrays the actual goals of the political actors involved.
> "Age verification" means that everyone who does anything online will have to submit to fine-grained tracking and recording of all their online activities.
"The literature on harms to kids from online platforms is complex and nuanced, rife with people citing small, ambiguous studies as iron-clad evidence that kids are being destroyed by the internet"
Sorry, but a firehose of unlimited pornography, violence, racist, misogynist, and divisive content for developing children is bad. You can "well actually..." me all day I don't care at all.
I agree that there's no good solutions here, and I think this is a genuinely complicated and difficult issue for exactly the reasons people often state. But every argument that pretends that it's a one-sided discussion should be dismissed out of hand. There are two sides to this, both thorny.