That is kind of a terminally online attitude about it don't you think? Exchanging pleasantries before getting to the point is a part of a lot of cultures in-person verbal communication and the point is to avoid the appearance or actuality of treating another person as a machine to be operated for maximum profit.
It just doesn't translate to online text communications at all, is so maladapted that it becomes actively rude.
Its gauche to call shennanigans on a simple faux-paus
I don’t know what your point is, truthfully. If we are to be considerate of our fellow human then in my opinion we should be aware of the medium we communicate on. I think everyone is smart enough to understand that just because I’m in your contacts list doesn’t mean I’m available, especially in a work context where just saying “hi” back removes me from whatever context I was in. Obviously if we are in person it is different.
It just doesn't translate to online text communications at all, is so maladapted that it becomes actively rude.
Its gauche to call shennanigans on a simple faux-paus