We have plenty of other organisational terms to denote a higher rank. What's wrong with those? They might even be more accurate. I don't suppose DBAs get in a ship to pillage and loot foreign lands for their database redundancy.
I see too many people arguing semantics or historical bias, or whataboutisms but barely anybody giving positive arguments to preserve the master-slave terms in tech. If "all races have had slavers" is the best you've got, perhaps it's time for change.
You don't agree —and that's fine— but does it harm you to rename it? That is past the initial inconvenience of it not being the word that it's been before... Is that any more inconvenient than the other API changes that almost all software goes through at some point?
I can understand some light grumbling, but I don't see why people get so bent out of shape they feel the need to start summarising slavery through the ages.
"It's just a word" swings both ways.
And if you think that no professional developers ever break their APIs on a whim, you're either very young, or haven't been paying attention. Google does this all the time across their ecosystem. It's annoying, but you learn to get over it.
If you don't like it, fork it.
It's not even a white/black thing. White people has had white slaves (millions), black people has had black slaves (also millions).
The Atlantic slave trade is just example of slavery. It has existed in many civilizations:
“Evidence of slavery predates written records, and has existed in many cultures. [...] the practice of slavery [...] proliferated after the invention of agriculture during the Neolithic Revolution, about 11,000 years ago.
Slavery was known in civilizations as old as Sumer, as well as in almost every other ancient civilization, including ancient Egypt, ancient China, the Akkadian Empire, Assyria, Babylonia, ancient Iran, ancient Greece, ancient India, the Roman Empire, the Arab Islamic Caliphate and Sultanate, Nubia and the pre-Columbian civilizations of the Americas.”
https://en.m.wikipedia.org/wiki/History_of_slavery