He's exhibiting exactly the wrong attitude.
Everyone's excluded from something.
Different people have different inherent talents.
Some people, like me, are never going to go into politics - I'm excluded from it because I don't empathize with you and I'm not going to lie about it and try and make you feel good. Politicians are very good at that. That's their thing.
Some people are excluded from higher order math but they may have empathy. They may make good politicians or social workers. I won't but I am very, very good at things mathematical, engineering, programming, etc.
The trick is to know your talents and then hone them. That is how you become very good. I'm very, very good at what I do. But I don't bother doing things I inherently am not good at. It's not interesting or pleasurable. That is the natural order of things.
We don't all need to be equal. My wife and I are different. She has empathy. I have math. We each have some other talents too and some overlap plus common core beliefs and goals. Together we're a great team. That's how it works.
Celebrate the individual differences that let the group be greater than the sum of the parts.