Also, the author conflates fiction with non-fiction. No kidding, if you include science books , guides, how-to books, etc. most books do not sell many copies, but they are not expected or intended to. It's not like the market for calculus books is that big. Fiction books by major publishing houses for a general audience still sell a lot.
Fiction only sells a lot if you hit the best seller lists. Most books do not, and it has been this way since at least 2000. For most fiction authors, you would make more money at a minimum wage job. You know, all the ones you haven't heard off because they didn't hit the best seller lists.
