This begs the question, why the assumption that anyone "wants" to use it? I just stated that one person got fired for using a word that another person can use with impunity. I never said anyone wants to use it, just the facts of the case.
And if you and others boiled all that down to the use of the "n" word I think that might say something about the attitudes that keep racism alive and well. It was used as an example of the "caricature" of political correctness, but you and others got hung up on some assumption that it means that anyone was arguing that it should be allowed to be used by all.
The person who was fired was forced/coerced into using it against their preference? I find that unlikely. Please explain.