When they find out the extent of the censorship they mind very much. But that's the problem, the censorship is so deep and so good that the vast majority of the Chinese never find out how extensive it is, because it's not just your WeChat, it's ALL MEDIA. The Chinese don't have access to over 90% of the internet, so they never find out what's out there or know what information they're missing.
And you're just trading one dystopian nightmare for another. Saying one is better than the other is like saying having a foot cut off is better than losing a kidney. There is nuance, they're both bad.