Not the OP, I think the main difference between then an now is that the internet in the old days wasn’t designed to be addictive, todays social networks and other apps are. For me it’s not about the severity of the the content but the addictiveness.
I remember two of my classmates being addicted to World of Warcraft. They both got problems, one dropped out, one managed to turn around. Today every smartphone game and the social networks are at least as addictive as WoW. Some people will manage it but some won’t.
I don’t know if OPs way to handle it would be the way I handled it but A I don’t have a better idea an B I don’t have kids (yet).
Shit, I talk to other functioning adults in their 20s and 30s and they tell me they too watched the same garbage.
I think you might have rose tinted glasses on to be honest. The Internet was just as wild back then.