Yeah I think you have it backwards. I don't think anyone has demonstrated any actual harms from porn, but social networks regularly fuck teenagers up.

I definitely would prefer my children to watch porn than get bullied - or worse - on social media.

There's also the fact that I vaguely trust Facebook or Reddit to do a credit card-based age check or whatever. No way I'm giving any of my details to porn sites.

Stupid dumb law.

Define "porn" then I'll think about what you're proposing to age verify.

There's porn on reddit though

Idk age restricting Instagram, TikTok etc. might be good for teenagers mental health.