At first I thought you meant "why are we on this forum," but now I think I get what you mean. I've thought this just about every day of my life, and I completely agree with you. It just doesn't seem like my/our values are compatible with those of the rest of our society. And it doesn't help that we apparently make up 1-2% of the population. Sorry, I'm not feeling particularly articulate this morning, but we live in a society where those who get to the top are those most willing to stomp on and do harm to others. If you stand up for what's right you get ridiculed.
Why are we here?
I just don't understand why INFP's are here. I'm one, and life is extremely difficult. Every single altruistic thing I try to do is met with blank, cold, unempathizing stares. Plus, I read somewhere how supposedly INFP's are defenders of the realm, white warriors or something that stand up for what is right. Well if that is the case, and we're assuming there is a God why doesn't God or the universe or the force make things a little bit easier for INFP's? I mean if we're already doing altruistic things that should be done, why so much resistance on the part of the Universe? Sorry I'm venting a bit. 
