The obvious problem with this approach is that it's essentially "I'm on the good side, and I need to protect the platform/society/world from the bad people who

The obvious problem with this approach is that it's essentially "I'm on the good side, and I need to protect the platform/society/world from the bad people who are not arguing in good faith. I can judge this, and so when I censor this, I'm not doing this because I don't like hearing opposing view points ... I just don't like hearing wrong, evil people who make arguments to trick me and the audience".... which pretty much looks exactly the same from any angle, in any group and you just need to replace a word or two in the justification for the cleansing. It's really a long winded version "there is no orthodoxy, it's just that there are the right things and the wrong things, and the things I say are right and should we really spend time listening to things that are obviously wrong?", which is a good way to make the point of the essay, ironically.