Age checks can be good
I thing age checks are a great idea to prevent under sixteens from looking at porn all day and thinking that's what sex and relations should be, and that being a porn performer in Only Fans is a great way to make some cash.
I mean all day but the hours upon hours they immerse in noxious social networks where they are wasting their time away, if not being manipulated by posers into thinking they are fat, that their skincare routine needs investment in expensive cosmetics, that those who do not dress appropriately or whose skin tone is wrong are despicable, that the earth is flat and vaccines are poison, or that they should outright commit suicide.
Not that sex is inappropriate for teens, it's only natural that they should be trying and eventually succeeding to have sex with others, and getting the occasional peep at a smuggled porn video, but their current deep immersion in porn is no good. Still, far, far more than porn, I think most of damage is done by social networks.
What age checks cannot be is nominal, but it shouldn't be too difficult to present an anonymous certificate that proves you are over 16, or over 18, without giving out your identity and leaving a track of the sites you've been allowed in or rejected from. The EU seems to be working out an anonymous system that could be enforced on hundreds of millions of Europeans, and I think that's great.
And with kids and teens in the proper places and accessing the right materials, maybe adults would not need to be patronized into games and movies oozing violence but lacking anything that prudes deem inappropriate for kids ;-)
What surprises me is that so many people don't ever flinch at the idea posting all their intimacies in Facebook, Instagram or whatever, being tracked by every site they peep in, and admit being ratted by their car, their phone, their security cameras or their very fridge, but find it intolerable to disclose if they are kids or not.