I think it's stupid to downvote your parent comment (and I upvoted it in hopes of de-graying it), but 1. downvotes are not "censorship", and 2. the behavior of a few individual voters here has nothing to do with "our industry".
2. With regards to here, yes you're correct. If anything I should be calling the people in question out for using HN like Reddit (i.e. I downvote that which I disagree with).