[aardvarks]

Agreed, it can sometimes be exhausting. But I think being kind is (to be rather mercenary) very practical also: I've found it is much easier to get people to listen to and go along with opinions stated kindly (it is also exhausting to try to get through to people who've stopped being receptive because they're feeling attacked or shamed, or anticipating that feeling).

And it's definitely possible to disagree, even sharply, in a considerate manner - eg focus on the point of disagreement, not on the person disagreeing; avoid name-calling; point out that the issue you disagree with may be valid in other cases; etc.