In my opinion, agitating for these types of changes makes tech communities more polarized since you are now making things that didn't used to be political, highly politicized.
It's not clear to me how changing the default branch name in a version control system and similar "inclusivity changes" makes the tech communities more inclusive, but I do very clearly see how it increases discord and contention in tech communities (see: this thread, previous threads on the topic, Code of Conduct threads, etc).
And I think that increased discord and contention in communities is not worth increased inclusivity (however you measure that).
I think a better, more compromising change would have been to leave default as master, but fix up the code base (remove hard-coded instances of "master") so that you can choose a different default branch name more easily (i.e. with `git init <default name>`. It's forcing the default name change upon everyone that people find unpalatable.