As far as the article goes, the word gimp isn't necessarily seen as problematic because of its sexual reference but rather as a derogatory term for disabled people. And just because many people agree that they don't care, doesn't mean we shouldn't care. Democratic decisions fall flat when they deal with issues of minorities. The large majority of people doesn't care about disabled people. So basing ethical considerations on the majority's opinion is really no good idea. Same goes for other discriminatory language and slurs where always the same arguments are presented. I think the article does a great job of portraying the gatekeeping biases of such discussions.