right now, because it's not widely used. If it ever gets mainstream, people will give governments whatever power they need to censor and try to stop things like child pornography. And once they can censor that, they can censor other stuff as well.

And I am sure you can come up with technical reasons why monero can't be censored. But i remember when China started their big firewall of china, people where laughing how trivially easy it was to bypass. And that their strategy will never work. Now 15-20 years later, nobody is laughing anymore. In fact a lot of countries seem to be moving into same direction.