I know mulattoes aren't that great, I'm just saying that almost every example of "successful black" is one, because real blacks are absolutely useless people and it's only the black+white mutts where the few ones who ever amount to anything are found.
You Americans count them as black in order to make blacks as a whole look better than they actually are. Whenever you classify mulattoes as black you are furthering the leftist egalitarian narrative.