I find it absurd, a ridiculous beat about the bush, that was never necessary growing up having friends who were 'black' and that was a fine description just like I'm 'white', what of it, and indeed closer back to (what was then at least) the out of favour/racist/not politically correct 'coloured'.
But as I said, I'm white, so it's not up to me, and if that's really what people prefer then fine - but I have the impression that it's a predominantly American (I mostly only 'hear' it online) turn of phrase, that's spilled over a bit sure, but generally not used/preferred here?