I think the point was that the user's comments didn't add much value to the site. If you don't have anything of value to say, then don't say it. Reddit is probably a better platform if you just want to say "nice", or something.

Note the phrase "a huge number" in https://news.ycombinator.com/item?id=26558343.

The banned user is a person who intentionally trolls comment sections, chats, and other forms of feedback. It's genuinely their goal to get banned.

In isolation, maybe it doesn’t, but reading through the comment history, the site will be better without these contributions.

Have any data to back that up?