In other words, the group that is supposed to be of superior intelligence, and which has the most to gain from a narrative of superiority, maintains, in your view, that they are not superior. Occam's Razor would say that they've come to this conclusion because they've found it to align most neatly with reality.
Or they would lose standing among their peers. All whites aren't in some secret club where we coordinate.
Oh nice you found Occam's razor. Can I borrow it to explain crime rates, test scores, etc.?