I think the topic of word use and PC is a great one but I am not at the moment willing to write an essay.
I found it funny to see one avatar showing on this thread - a picture of Samuel Clemens - who wrote great literature with
words used generally in his day like nigger.
We have been revising poetry and fine literature since the begining of the written word - the bible, Shakespeare, Brothers Grimm, etc.
There never will be one answer to the many questions - just many opinons that will continue to change over time.