Because otherwise I or any other sensible person wouldn’t buy it. Who should sell books on how to make a living online? People who haven't made a living online

Because otherwise I or any other sensible person wouldn’t buy it. Who should sell books on how to make a living online? People who haven't made a living online? Then, would you buy it? Yes, people who earn money only by selling such guides and has little earning outside of these books/courses, then those should be avoided. This is the reason I don't buy self-helf books from most authors. If your largest success is selling self-help books and milking corporate funds for "employee growth", then you aren’t getting a dime from me.