Coyote
Whenever you prioritize the selection of managers, or base promotions, on factors other than competence and ability, you likely don’t end up with the best.
And it doesn’t just have to be about race. I worked for a company that was very big on gays, and to a lesser extent blacks. If you were gay, your odds for getting hired, or getting promoted, were significantly higher than if you were straight. (Word got around, and the place was about 30% gay.) And if you were gay AND black, you were golden - promoted right up the ladder to the top, regardless of ability.
The result? The most bloated, mismanaged place I ever worked. The white and/or straight subordinates to the incompetent black and/or gay managers ended up doing their jobs, and making the decisions they were unable to.
The turnover among the white and straight subordinates was massive - and there was nobody who remained after a few years. In the meantime, there were managers there who had been there for 15 years and more, and why? Because they knew they couldn’t get an equivalent job elsewhere.
Most mismanaged company I ever worked for.