I've always found that non-published writers argue the most over semantics. . .
In the world of Madison Avenue, I was often called a lot of things (besides SOB)--managing director, CCO, COO, GCD, CD, copywriter, senior copywriter, etc etc. Using a pen name for contractual and conflict-of-interest reasons, as a writer you were called a lot of things--author, writer, business expert, business reference, etc.
Only three labels ever mattered--
1. My wife calls me "Dear."
2. The daughter calls me "Dad."
3. The banker calls me "Sir."
Beyond that, labels and what to call me, or any other writer, is for the benefit of the person doing the labeling--not the writer being labeled.