I believe what you describe. I believe there are plenty of people who have the problem you describe--to a significant extent. And of course it's not limited to who you hire, but also who you associate with, and how you treat people. Many people, of all walks of life, act based on their assumptions of others, to some degree.
I'm a scientist. I believe in the power of observation, action, and assessment (further observation). If I perceive that a problem exists, then I: do my due diligence to determine the extent to which it exists (if at all), determine if and how I should solve it, and carry out that determination. I believe there are plenty of people that could use an adjustment, at least for the matter you describe.
But I'm an even bigger believer in priorities. Of investing energy and time--of our one, limited life--towards the goals that I think matter the most. The health of our planet and power inequality, for two. There are just some people for whom any such "adjustment" would only serve to (at best) distract them from other endeavours, where they may be sorely needed. Good people, who do truly good things. At what point do you stop this (re)education? Can we hope for a complete disassociation from our biological tendency to observe and encode patterns? Do we even want that? At some point, the energy expended on a perceived problem may greatly outweigh the returns you get from the investment. Energy that could have been better spent.
Right now, I see much energy--mostly talk--being devoted, in a "shotgun" approach, to this problem and other social problems. I see it talked about in mass-consumed venues, and I see others parroting talking points. But for me, my colleagues, and my friends, it just isn't a problem. I interact with individuals all over the world and we are able to work together toward common goals. And I think that's what matters most.