Comment by user_7832

> a great many time consuming pleasantries

> Oh the horror!

Indeed, that is precisely the case for some folks - with social anxiety. Or autism. Or a number of other mental states.

Maybe they're tired to their bones and barely have energy to even have one meal a day? Maybe they lost a loved one and never quite recovered since then?

It costs nothing to be polite and assume best intentions from the other side.