This is why the stock market (specifically the Nasdaq) and real estate, tech jobs are so great for building wealth . none of this unpredictability of having to rely on user/reader engagement or guessing the whims of reader or publisher tastes. For investing, being successful is as easy as parking your money and watching it grow. The creator/engagement economy has vastly more losers relative to winners, which makes it impractical.
It's not just unpredictability. It's that outside of doing explicitly commercial work (and often even then), the average and certainly the median income for a great deal of creative work is really low.