It's only bizarre if you consider ByteDance as some plucky startup that is being repressed by USA. If you consider it to be under the thumb of the Chinese state then blocking it seems to be the best action to preserve free speech.

Will TikTok remove Chinese propaganda on their platform, how would that conversation even go at their offices? Can we trust that TikTok will not in future censor things that China finds uncomfortable such as Taiwan being an independent country?

Just a few months ago HN was getting exercised about the rights of Hong Kongers. I'd say it is wholly consistent with the political beliefs of the average HNer to want to see a social network operating from within an autocratic state to be banned from operating, or at least under heavy scrutiny.