I'm a 20000 hours person. Knowing what I know about what I do, it's real sad to see someone misunderstand what goes into creativity this egregiously. Prompt engineering is such an unbelievably watered down "version" of making a painting. It's like writing a page, or even a folder! of bullet points and handing it to a ghostwriter, then telling them "put the end result between Shakespeare and Poe".
That's not unleashing your creative voice. Unleashing your voice and acquiring technical skills in a chosen field are the same. If you endlessly mixed all the prior classical works, it doesn't matter how you weight them, it won't spit out Mozart. You're stuck in the gamut of the model, between the maxima points of each artist.
It's an incredible tool to generate stuff quickly, and to some extent it will help artists whose work depends on quantity over quality.