Perhaps none of the films they were in were not good enough or their acting was not good enough.
I have a very old friend who does some of the screening/nominating for the OSCAS ( No financial reward). If he does not like a film within 15 minutes of watching it it then it goes no further as far as he is concerned. He certainly is not racist.
morddwyd exactly the point. It's discrimination in one form or another. Unless there are very exceptional reasons why it should be a man or a woman, or should be black or white then it should be the best person for there job irrespective.