But knowing one's own biases and the potential biases of others
  does make for more effective communication when done properly.
  it's not legitimizing their *ultimate* validity - as ultimately,
  I don't there's a heck of a lot of difference between people, on
  a deep-down level.

  But we're also social creatures with social expectations and..
  well, ignore at one's own peril. I've been the hippie-type
  treat-everyone-the-same _without_ paying attention to how I tend
  to appear to different groups of people - because I didn't think
  in terms of "groups". (I still have trouble with that). But I'm
  at least _aware_ of the potential of trouble by those who *do*
  think in terms of groups... and "what my actions represent as a
  member of a group" that I might not even see myself in.