I don’t think any rational people are offended by the word “blacklist”.

I do think there is some validity to the change.

Black lists are lists of bad things that need to be blocked or prevented, white lists are things that are good and allowed and wanted. That does create an unsavory connotation with the words themselves.

Furthermore, as someone in an industry that used blacklist and whitelist extensively, noobs screw up those words all the time. It’s not a very clear word. Blocklist and allowlist are much less ambiguous.