A much simpler explanation is that people who read and comment on HN do not want to see every conversation degenerate into yet another political fistfight, since it seems to have infected every other part of our lives. One of the core values of this community is that we mostly manage to avoid that.
It's interesting how I can reference, with no personal opinion attached to it, a factual, recent situation that's comparable to the thread - about a well-known person who happens to be a politician - happens to be a politician, and as you said, because you're exhausted of hearing about them, you'd prefer they be censored/avoided in conversation. It's interesting to say the least.
P.S. Triggered is a valid word, I used it in the correct context - and you were in fact triggered by using it and are trying to gate keep its use.