Well the whole article gives me the feeling of exactly what the author detects in others calling themselves prompt engineers. "You're not prompt engineers, /I'm/ a prompt engineer" and then goes on to suggest blending prompt results and performing some basic calculations.

True "prompt engineering" is knowing how to get a desired output, reliably, from an input. How to do things like information extraction, inference, expansion, transformation, instruction, etc. But sure, we can zipper two outputs together and write tetchy gists too.