I can't really agree with that, if basically nobody who is called a word doesn't care about it, it is a waste of effort. Maybe if the world lacked the millions of other far more pressing problems, but it seems like a complete waste of attention span to care about. Even if we change all these "offensive" terms that were once derogatory but now in regular neutral usage with minimal efforts and no resistance, what was actually accomplished other than some trivia question being eliminated?

In 50 years or so, people will just say the next round of terms is insensitive, especially as language continues to change and evolve, and repeat on forever.