Earlier quoted context omitted.
You miss the point. This isn't about offensive language. This is about language that conveys exclusion of marginalized groups. To view this as a case of people being offended does a disservice to the overall social issues these groups deal with.
You seem to be saying that master boot record "conveys exclusion of marginalized groups" but gimp (an offensive term for someone who is physically disabled) does not. I don't initially come to the same conclusion as you on this. Would you be willing to talk me through your thought process?
The terms master and slave are dictionary terms, and their usage is generally a similar meaning to the historical acts at the root of the issue.