It wasn't difficult to find, it was just in your parents' or siblings' drawers, or your friends had it, or you or someone else had Pay-per-view TV or one of the soft core channels, or you or someone had illegal cable/sattelite, or it was just out in the woods[1] for whatever reason.
No one's minds melted from that.
If access to content is so unhealthy for anyone, then policy should address that. For example, sites should throttle or cut heavy users off. Giving 3D models of our faces + our IDs/passports online just for some government contractor to lose them is a solution looking for a problem that it does not solve well.
Funnily enough, I was going through my grandfather's possessions from when he was a kid and found what can be described as cartoon adult content in with his comic books. This was shit from literally 100 years ago, and yet that generation turned out alright by most standards.
[1] https://dangerousminds.net/comments/the_inexplicably_ubiquit...