What I find weird, is why people would comment that kind of worthless stuff when they could just give an upvote. It doesn't add anything to the discussion. It is just worthless fluff.
And writing responses like that comes close to that. I understand it, kinda, because I use to do the same. When somebody writes me some message or sth, I often reply with a short (but still unnecessarily long) text. I even do this when I wasn't directly talked to. So that's a habit.