Yes, there is racism, sexism, and overt/implicit bias throughout American society...including whites, blacks, Asians, Hispanics, men, women, sexually confused, Christians, Atheists, and yes, professional pilots.
The bias among professional pilots (as a whole) against minorities is certainly less than it used to be, but it does still exist.
Does that mean all professional pilots are biased? No. Does it mean "the system" is biased? No, absolutely not. Are there greater socioeconomic factors that play a far greater role than bias? I would argue absolutely.
While reality can and should be acknowledged...let us also not go exaggerating occurance or impact like it is some sort of fundamental flaw.