That might be the intent, but in a lot of ways it expresses the opposite. For at least half of the terms flagged by this page, one would have to construe the meaning uncharitably for it to be a problem. If I call someone a paraplegic, I only imply that the person cannot walk, not that the person cannot accomplish other great things. If you try to tell me that I meant that that person isn't a person at all, then you are the one being unkind, not me. It is not the case that "masters enslaved people" - some masters did, but some masters also served as teachers to an apprentice, and if you tell me that I meant the kind that enslaved people when I clearly meant the kind that taught apprentices, then you are the unkind one, not me.