I understand what you mean, and agree that not everything needs to be put in words. At the same time though, it's really healthy to expose yourself to others even if you just write "I like the way you formulated this." or "Makes sense, I hadn't thought of it like this before". That way it turns into a real discussion - a bit like in the real 3d world.

Up/ downvoting is basically anonymous and adds nothing to the discussion.

And, sometimes, other users misunderstand our comments, and then we need to respond to them to get our point through. All of this is a healthy way to challenge our thinking.