Much like CACs label Elvis as the King of Rock and Roll, they gave all the props to Fred Astaire and Gene Kelly for tap dancing.
The Nicholas Bros. met Fred when they were still teens and showed him a thing or two. Black folks saw Irish folks clogging all stiff and rigid and turned it into something so much more rhythmic and fluid. We took that shit to the next level, seasoned it and gave it flavor and CACs tried to claim it.
Gene Kelly using them like Rock/Pop groups use black background singers to achieve a soulful sound, etc.
Those brothers were about the best to ever do it.
Oh course, and this happened over and over. So much so, that it was a well know fact that one way to make it early on in America, was to find something that a black person excelled at, copy their concept and sell it to white people.