Which is the point. Kinda like how freedom of speech lets you say stuff, but you can still be kicked out of a BLM event for saying something racist. Rather, if you have something you don’t like about a post, just say it instead of just down voting, and they’ll judge you based on that comment.
It just replaces the down votes with comments. I don’t consider argumentative responders to be obnoxious either, so I guess it depends on what kind of environment you want.