There is enough general public concern about minors having access to online pornography that jurisdictions all over the world are passing age restrictions but I think the HN discussion is one sided.
That is, HN users see the costs, the difficulty, the privacy concerns, etc. But they're also dismissive of the harm, which in terms of the young Gen Z men that I know personally is real. I can't attribute online pornography 100% but the damage includes criminal convictions, falling victim to "blackpill" ideology and other false answers to gendered problems and frequently people giving up on work and love.
I collect ero images and restrictions would personally be a hassle for me, I can't say I am against pornography in general, but I've got some concerns about pornography today. I think advocates are stuck in the 1970s when it was tamer and much less prevalent than it is today -- it's entirely different for a teen to have a few issues of Penthouse or Hustler than it is today.
I think the story of how it relates to relationship satisfaction is nuanced. Personally I think OnlyFans is a cancer. I want to feel special in a fantasy, and not as the biggest simp in a room full of hundreds of simps. (And this is healthy narcissism [1], not pathological narcissism. In good sex or sex with love, somebody thinks you are special)
I'm not sure what the answer is but I can see it both ways and that seems rare on HN.
[1] https://en.wikipedia.org/wiki/Healthy_narcissism