In Dutch (both in .nl and .be), the English term 'master bedroom' was fashionable for a few years, until the stigma of that term carried over from the Anglosphere and it's now being replaced (in the woke areas of the country) with 'ouderslaapkamer', which is literally translated 'parent bedroom'. Although now that term itself is 'controversial' (not mainstream controversial, more in small hardcore circles, so I'm not sure if this will actually become an issue) because (to the best of my understanding of this objection) 'parent bedroom' implies that the 2-parents-with-children family form is normative (you can't make this up if you tried to), which it shouldn't be.
Not sure what my point is, maybe that using 'master' for 'main' is no longer outright commonly accepted usage?
But the objections I read about last summer (tried looking but I can't find it any more) were moral, that the term is also 'oppressive' (not sure if that's the actual term they used, that was the gist of it), basically the same arguments that are made for removing 'master' from Git, language frames our thinking etc.
Probably descended from the Latin word "magister", which (despite Rome having plenty of slaves) didn't neccersarilly refer to a slaveowner -- indeed many Roman slaves were Ludi Magister -- educated slaves that were teachers at Roman schools
Etymology of "master bedroom" seems to come from "Master's bedroom" in boarding schools, where it was the bedroom that the school master occupied (with Master having descended from Roman times)