In the context of Git, "master" is not used in the sense of a master/slave relationship but as a master copy. Are you hoping for a blanket ban of the word "master" regardless of the context?
Do you know where 'master' originates from in the context of Git?
He regrets it now because of his lack of English language knowledge at the time and that "main" makes more sense but he originally based it on the "master copy" concept.
I personally don't understand why people decided on this hill to die on. There are much better targets like database master-slave replication.
It seems then that master doesn't seem like a very loaded word in the context of git. Even so, changing it would then not be very impactful as well (not counting any CI/CD or other config that relies on the master branch name).
Let's be honest, the world isn't going to be better because the default branch of git is called main instead of master, but it will probably be slightly worse if you impoverish the language of hundreds of millions of people, which also happens to be the main international language.
As maushu said above there are much more meaningful targets.