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.