Eliminating words from a vocabulary is very 1984-like. Those words have a deep historical meaning, allowing ourselves to just "remove them" is akin to forgetting and ignoring the dark past of slavery, rather than remembering and acknowledging it (with the hopes it will never happen again).
Saying that it helps change habits (in my opinion) is analogous to saying that preventing kids from playing violent video games will reduce mass shootings (there is evidence it does not). I disagree with your premise that this pushes us to change habits and is only a mechanism to be ashamed of our shared (and dark) history. Lest we forget.