Because being offended is cheap and it being real is unverifiable. Thus there is a cost asymmetry which makes it trivially exploitable.

> It's not like we're redefining the color blue to appease red-ists.

I am deeply offended that your source control denigrates people from non-conventional families[0]. Please purge this insult from the internet on my behalf.

[0] https://en.wiktionary.org/wiki/git#Etymology_1