I am in favor of stricter age verification for certain content. Not only for porn but also dating apps, social media, online shops, etc. But the current methods of age verification are a privacy nightmare and go well beyond what is reasonable. Especially since companies can't be trusted to not do bad stuff with that information.
What is necessary is a double anonymity age verification service. Ideally run by a company that by law is required to be very transparent. That way we don't have to provide personal information to companies that have no actual need for it but can still reduce the amount of minors getting into places they shouldn't be.
Yes, it won't be perfect, yes there will always be bad actors, but it will still do more good than harm.
I personally am open for a discussion about reducing the minimum age to view porn. I don't have strong feelings either way.