[gruez]

>which are lobbying for it so they can earn money with users' preferences

Given it's a field where you can put absolutely anything in (and probably randomize, if you want), how is this different than the situation today, where random sites ask you for your birthday (also unverified)? Moreover Meta already has your birthday. It's already mandated for account creation, so claims of "so they can earn money with users' preferences" don't make any sense.