The politically correct movement often gets a bad rap for tearing away any legacy meaning, offensive or not, in words to ensure the smallest special interest groups are not offended. Even when it is at a great expense and amount of reprogramming for the general public.
Right or wrong at the root of it is the fact that words, mere words, are immensely powerful. Not just for their intended meaning or latin roots, but the bundle of meaning they adopt over time. Meaning that can be completely different in different parts of the world, or even neighbourhoods. Meaning that can evolve within a particular geography over time naturally or intendedly.
To be honest I've never really given that much thought to the politically correct movement. It's not that I disagree, it's jsut that as a white male in good health I've never felt a part of it. Though have been affected by it and asked to changed my verbiage by it. This incredibly candid post by Charles Frith got me thinking about this fact. Good for you sir in sharing this experience.