I can’t say I never downvote anyone but I get into these comment chains from time to time where really no matter what I post whoever I’m talking to downvotes every response but I generally shy away from downvoting even things I dislike. I don’t want to fall into an echo chamber where all I see are only the things I agree with.
It is pretty common that people treat their views as an infallible truth. Anything they think is good and smart and any disagreement is bad and dumb.