Equally, I think insisting that there must be no controls to internet access whatsoever is not right either. There is now plenty of evidence that eg. social media are very harmful to teenagers - and frankly, before I noticed, going on FB got me depressed each time I did it at one point. And as a parent, you realise how little control you have over your children's tech access. Case in point - my kids seem to have access to very poorly locked down iPads at school. I complained, but they frankly don't understand.
We all accept kids can't buy alcohol and cigarettes, even if that encroaches on their freedom. But or course flashing an ID when you're over 18 is not very privacy-invading.
Likewise, I think it is much better to discuss better means of effecting these access controls. As some comments here mention, there are e.g. zero knowledge proofs.
I'm sure I'll be told it's all a sham to collect data and it's not about kids. And maybe. But I care about kids not having access to TikTok and Pornhub. So I'd rather make the laws better than moan about how terrible it is to limit access to porn and dopamine shots.