People tend to be heavily influenced by their environment as they grow up. And if the majority of your peers see X as being "cool", that's what a lot of people will try to achieve.
For example, during high school years, the "popular kids" are the jocks who play sports, not a geek who plays with code all day (although this has shifted a lot lately). If you look at it this way, the guys who go on to play an the NBA do it not because they are "underprivileged" and racially profiled to be kicked out of studying, but because that IS the valuable route they want to choose. Likewise, the current state of the music industry is heavily influenced by black culture. You could say pretty much everything is black culture influenced, from rap to r&b to Jazz to dance music. So a lot of black kids look up to those artists and creative people, and they strive to excel in those areas. I think that's great.
There's a reason why fighting arcade games and strategy games like Starcraft, WoW, etc. are dominated by Korean pro gamers. Nobody said blacks shouldn't play Starcraft or Tekken, nobody told white guys to stop playing. Koreans were simply heavily socially incentivized to be good at it.
Same goes for football (soccer). Nobody said Brazilians are the only privileged race on earth who are allowed to play football. They were just heavily socially incentivized to do so because that's what's considered of value.
Once you stop thinking as a victim and start thinking more positively, there are many explanations to the "mystery" you just can't seem to figure out.
p.s.
Just to be clear, I am not denying that racism exists. I would however like to point out that the people who keep blaming everything to racism are the ones who are actually subliminally racists.