I don't think being cossetted in a media bubble is the same as having no ability to self-reflect. It's just that so many people have so little occasion IRL to challenge the beliefs they've been fed from birth. Some people can be deprogrammed.
I hope :(
I just had a horrifying vision of AI SM tools that help you optimize your public presentation. Get AI critiques as well as tips for appearing more favorable. People do it because you need to be well-received by AI evaluators to get a job. Gradually social pressure evolves all public figures (famous or not) into polished cartoon figures. The real horror of the dead internet is that we'll do it to ourselves.
https://en.wikipedia.org/wiki/Play_(play)