I think it may seem like the people that get the promotion over you don't care. Especially when you're feeling upset about being passed over for the job and you're looking for someone to blame/some excuse to comfort yourself. Not trying to come across harshly, I just think it's a natural thing for people to do in that situation. Chances are, they do care about the promotion, even if it doesn't seem like it. If they really didn't care, they'd quit, or be fired.