This is a classic libertarian take that I would have supported two years ago. It's the "morality vs legality" argument. Which could be fine in a healthy society. However, in a depraved and gross and mentally unhealthy society, morality can (should) actually become legality. Sure, we can all run around with sperm on our faces and eat shit until we die, but what would happen to human society in a couple of years if we ignore morality and basic human decency?

Although I agree that just "banning" stuff isn't going to solve the problem. It's a much more deeper issue and it requires education (not talking about schools) and higher spiritual and intellectual beliefs.