My overall point being, no one is submitting design files to ChatGPT for analysis or emailing their friends in China test reports to get a second opinion on the experimental results.

A lot of aerospace engineering is touch and feel. Someone has a "sense" for when to do the next step, and how to finagle the part so it comes out a particular way. They can train someone, if they apply themselves intently. But they probably couldn't explain it in words if they tried.