As a commercial artist, this rings true. The systems are capable enough and great for breaking up creative blocks, building mood boards, and other non-deliverable assets or pieces that have deliberately loose reqs. But natural language is simply a bad way to convey what commercial art deliverables need to be. That's why nearly every design contract has a built-in number of included revisions. Even with premade assets and a back-and-forth with sketches and proofs of concept, it's nearly impossible to write a final specification that perfectly conveys what the deliverable needs.
Laypeople love these tools so much because they abstract away a ton of stuff they don't need to think about to satisfy their requirements. Unfortunately, those controls are very consequential to professionals. Aesthetic controls seem great if you're making something to look at, but lack the precision to maintain completely unbendable branding guidelines or similar constrictions. The results aren't repeatable enough to perfectly maintain the appearance of an iconic character or logo-- an absolute must. They also need more granularity to finely control composition in addition to subject matter. For example, I might want to have the edge of a man's sleeve form an imaginary line with the buttons on his shirt that forms a rough logarithmic spiral that terminates in his iris and have the bottom edge of his sleeve which is resting against a table point towards the upper-left-hand corner of the screen, where I'll later place a logo... and that's just a teeeeeny aspect of that image. Beyond that, the handles to mitigate these problems completely differ from how artists reason about them.
I think Adobe and other companies that make professional tools for commercial artists are going to lead the way here, with interfaces that more accurately reflect serious artists' processes and requirements. At the same time, Midjourney et. al. will let others get creative with stuff for their amusement, PowerPoint presentations, etc. Nothing wrong with that, but they're not about to blow up anything but the lowest-end commercial art world in the near future.