People aren't offended by the change; they're irritated.
I'm irritated because it was an unnecessary change based on unsound reasoning, made by people who claim to represent a minority while not belonging to the minority or understanding its members.
I'm irritated because I can't give instructions to junior developers as easily: no longer can I rely on all of my instructions working, and documentation now requires clarifications and caveats which used to be unnecessary.
I'm irritated because it appears that GitHub has made it intentionally difficult to change the main branch in the "new repository" page; while it shows an option to change the default branch name, this requires refreshing the page and losing the repository name and description which you've already written.
Because it's utterly useless, stupid, out of context. Why Git, github, Azure DevOps, everyone have to change that and possibly broke backward compatibility with scripts, pipelines or who know what(yes, I can branch master from main, but why I have to?)? Why?
Should we completely stop to use master word altogether?
It's because I detest virtue signalling. I especially detest companies virtue signalling solely for the sake of appeasing the woke mob, a minority of people, in a transparent attempt to show how "anti-racist" they are.