Also, I will not do something that makes another feel uncomfortable; I am just interested in why some feel as if I should do things to make a person feel comfortable. Why do we care if we're liked? Why does it matter? Is social grouping as important to us as it was through our evolutionary history?
I know i just felt bad for your mom so i wanted to say something lol.
But the answer to all your questions i think is that we are "hardwired" to care.Empathy is hardwired in us. I do not think it is as important as it was but it is still important some. Like if all your freinds are rich and upper class your going to have more open doors.