Especially if you consider the possibility of someone loading state secrets onto the chain. It wouldn't take a state actor to initiate that action, but that state actor could render the chain worthless.
I was just thinking about this a lot this week, actually. The really crazy thing is that, due to the PROTECT Act, a person in Japan could legally upload certain manga that the US would consider CP. So one wouldn't even have to risk jail to poison the blockchain.
Unfortunately, most people are too puritanical to even dare to think about the topic, let alone opens debate it or soften the law.
The law is there to protect children, profit doesn't feature in the calculations.
Normalization of behavior is a worry that always comes up with "immoral" information. Violent movies, violent video games, adult porn, strip clubs, prostitution, open homosexuality, etc. You'd need actual evidence to support the claim that it makes things worse not better or neutral.