The same reason blacks dominate basketball. When it comes to requiting you simply hire the best not based on race or creed but only ability.
Larry Bird often played against “Magic Johnson.” They were dear friends but opponents on the court. Perhaps I may get the quote wrong, but Larry Bird said what if Magic Johnson is not there as my opponent. They were friends.
They were not friends until deep into their rivalry. They HATED each other until they shot that commercial in French Lick.