I've worked on products that used master/slave terminology. I'm bothered that those products have been sold in places where those terms have strong connotations like southern USA. I don't like the idea of (say) a black person in Georgia having to talk about "masters" and "slaves" in project management meetings with their white bosses. That just seems gratuitously unpleasant. That image in my mind is why I won't choose the terms master/slave when building things in the future.
Do you realize that when doing so, you're actually not eradicating racism, but perpetuating it? You are not being thoughtful, you are just enforcing the association between slaves and black people. Every time you carefully avoid using those terms, you are expressing the association between "black", "slave", and "master".
Why would it be unpleasant for a black person in any Western society to talk about masters and slaves? There should be no association! You are not responsible for the evils of your ancestors, nor are you the product of evils done to your ancestors. You are your own person, interacting in a society where slavery is considered horribly wrong, a crime against humanity. We all agree that slavery is monstruous; that the entire institution is wrong, and that we must learn from it to not repeat that kind of monstrous actions. The idea of associating someone with slavery just because of their skin color is itself racist!
I like how Morgan Freeman put it: Stop calling me a black man, and I stop calling you a white man. I know you as lukego, and you know me as nominal animal. That is enough.
If being blunt this way is racist because a snowflake may hear a word that hurts their feelings, then fuck, I'll be a racist. I refuse to treat anyone differently just because of their skin or "race".