They are just trying to identify you so that you can be flooded with designed advertisements. They don’t give one fig about minors accessing pron. The numbers of ads on YouTube have ruined it. Ads. Ads. Ads. Ads .. ad infinitum
Really, what they're trying to do is end the ability to surf and post on the internet anonymously.
It was never about porn. "For the children!" has always been the mantra to have more regulation and oversight over our lives.
And, sadly, many here were cheering it on. Just go peruse the multiple threads about age verification coming to PornHub as if this obvious consequence was unforeseen.