This is a harsh reality for those who dream of making it big with their creative endeavors — success is dependent on you being an outlier. You need to find some other way to support yourself.
I tried my hand at being a starving writer. I'm not going back. I spent years as a part-time ghostwriter writing all kinds of shit and honing my craft until I was able to support myself full-time with it. Longevity is the name of the game.