No offense directed to anyone, but at times like this, i'm a little ashamed to be a white premed. If you can't recognize the lack of diversity in medicine as a detriment or think of situations in which other values supercede merit alone in society, I fear that you are either a conservative midwesterner (as a Kansan, I think I can say this...) or feel inadequate with respect to your own ability.
Is race a valid indicator of educational background? No, I agree that socioeconomic status would be a more valid judge of that, but since when did voicing complaints directed to no one solve anything? If you feel really strongly about, take action and write a politician. Otherwise, focus on what you can change...