Harsh isn't the same as shallow. I don't believe snark is ALWAYS uncalled for, only that you deploy it when it's reasonably necessary. And this is a thing that people, especially HERE, get wrong a LOT. That it's unpleasant or hits people where it hurts doesn't mean it's not important, and I think it is.

The issue is the effects that it has on the ecosystem. It dumbs down threads and makes people nastier.

If someone is wrong and you know more than they do, you can share correct information without putting them down.