Let's say one were 90th percentile level good, what is the out/endgame for how much money a writer can make these days? Like if you're the writing version of the most entry level pro player on a hockey or basketball team - in the big leagues, but still bottom rung of a tall ladder, are you earning average software developer income at that point?
Almost all the pro writers I've known (n=50) had one of a higher-earning spouse, independent means/inherited real estate, an editing/teaching job that they occasionally wrote through, or a grant funded position or fellowship.
Assuming it's Pareto distributed where the top %20 of writers make %80 of writing income, how much can a good writer expect to make?