I really don't understand your point. I don't like everybody, and not everybody has to like me. That doesn't mean i'm out to actively ruin someone else's day.

If we look at the issue rationally, it's an issue of coordination and sorting. People that have mutual kinship can improve their position with people with similar interests. If you have some sort of "objective coolness" in your theory of friendship, then you may run into issues with constantly shooting yourself in the foot by only pursuing friends that happen to in the upper tiers of your coolness bell curve, and their will always be the paradox of choice, but i'm not really sure why i'm not supposed to have preferences when it comes to the people i associate with.