Since you went there...
What makes white guys more inherently equipped to play the Quarterback position?
What's your honest opinion?
History and that is all.
Same reason black guys are better boxers and basketball players. It's just history.
It's not to say that only black people can box or play basketball, but the overwhelming majority of great players in those sports are black guys.
The overwhelming majority of great QB's have been white dudes, and I get the whole systemic ways of the 80's not believing in black QB's, which were complete BS, but we have had plenty of black QB's start since then and only a few have been truly great players.
Could just be an odds thing like basketball or boxing, but history tells me there is a trend for areason.
If you want to get deeper than just history, I think it's because white dudes aren't as physically gifted so they spend their days early on learning the technical side of the game in HS, while you got guys like Young/Vick who are so physically gifted they just outplay everyone off of pure skill up until the NFL level.