I don't know of any connotation of black meaning "evil, bad, or undesirable". If anything black means "missing or vanished". Maybe that is different in your culture, but I never heard of it until now. Tons of things in everyday life are black including the most letters, signs and a lot of devices. The only thing that comes to my mind is tooth decay or pestilence, but that is hardly anything connotated with the colour per se.
I'd be curious to see a regional reference that shows an absorb/reflect etymology.
Now, the left wing activists have turned it on its head again, and now saying that the term "black" is shameful and racist. It's bizarre how ignorant people are who say the term "blacklist" is racist.
Or maybe you are confusing the idea that 'using black to mean bad and white to mean good' is a problem?
Those are two different concepts.
Middle gray, according to modern UX designers. ;)
Blocklist makes more sense in most scenarios.
