Haha. It's a good question. I wonder if people like that ever pause and re-read the things they write.

I think they just fire. Like it probably doesn't dawn on them to consider their word choice and how well they expressed their points and all that. Other people are supposed to agree with them "just because". Just because they'll get upset if you don't. So they aren't really in the business of thinking about their end of it and how they could improve.