They have all this data about people, yet they're too lazy, or too genuinely puritanical, to actually use that data to show the right ads to the right people. Take for instance the category of drug "paraphernalia," (not to mention actual drugs). Neither Facebook, YouTube or Google will allow advertisers to advertise for these kinds of products, even in markets where they are completely legal. You'd think a more reasonable, and profitable approach, would be to use all that data to only allow advertisers to target these kinds of ads to people of legal age, in markets where these products are legal, but no, no-one can advertise them to anyone, anywhere, ever.
And what about sex toys? Why can't videos of say sex toy reviews, be age-gated, and then so called "Adult ads," you know, only be shown to the verified adults watching those videos? I'm sure there are lots of sex toy companies who would love to advertise to that audience, and I'm sure someone watching a sex toy review video would much rather see an ad for a sex toy than for another fucking Nissan, but yet again, Google et all would rather impose their bizarrely puritanical morality on the world, than do their jobs and build a system that actually works.