Playing the devil's advocate a little, you say "can't also do", but that implies prohibition, not hindering. Hindering is not total like that.

It's like trying to have meaningful conversations on Twitter. You don't go to Twitter to do things like that. Can you? Sure. It's just not what the format and the conventions (and the people) lend themselves to.

I don't think there's much merit in pretending that human activities are only shaped by hard limits.