Plus, it's not really stirring up controversy saying "hey, we should probably change the term to ~this~, which is equally or more descriptive, in a way that doesn't rely on historically problematic contexts". I think what you're focusing on is chiding people who still use the older terms; I've never seen that happen. I've seen people mix terminologies when discussing something, and oftentimes that has led to the person using the outdated instead using the updated, possibly with a conversation in between, but I've not seen someone call out "how DARE you use (technically-correct-but-outdated-term)!"
That said, I've also never seen anyone dispense with the word 'master' -except- in contexts where it is used to differentiate from 'slaves'. The parent post also only references in that context (though the great-grandparent calls both out separately, though one right after the other, which is likely what is muddling things).