>But does it not strike to you at all problematic, at the moment, that 'black' is a synonym of 'bad' and 'white' of 'good'? Does it not occur to you that it might improve our language to change that?

It's not just a language thing. It's an extremely deeply rooted symbolic system. You can't arbitrarily change it, and even if you did... what improvement does shifting the symbols around yield ? That's just increasing the noise to signal ratio.

Even then, isn't the real problematic part assigning elementary colours to skin tones ? Can't you just try to change that instead of contorting the deepest part of a culture on a Procustean bed ?