p.s. why do you think most professional boxers are minorities

I guess you mean in USA? Probably because boxing is more popular sport in low income families on big cities, and in USA that includes proportially large amount of black people because of reasons… This is purely a guess based on Hollywood knowledge, so I might be very wrong.

Looking through the wikipedia list of current world champions, it’s not in any way dominated by “minorities” as in people with heritage from country other than for which country they’re competing.