Every word that is commonly or uncommonly used has a physiological impact on perception that is not directly measurable and causes biases. In this case, whitelist = white = allow = positive. Blacklist = black = block = negative. Do you want peoples brain to subconsciously associate words like that?
Instead if we use words like 'allowlist' and 'blocklist', it reduces the association with people's skin color/ethnicity and hence the hidden biases that we do not know are present. This stuff takes generations to fix.
A well-dressed man doesn't want an ink stain on his crisp white shirt, even if he's black.
When people get cavities, those are black spots on white enamel regardless of race.
Sorry, the white-substrate-black-stain metaphor isn't going to die any time soon.
Also, the absence of light looks black. Daylight will continue to be white and nighttime black; people will continue to stumble in the dark and be afraid, regardless of their skin color. Violent crime will continue to prefer the cloak of darkness.