At a high level I think a lot of it is simply hubris from software engineers who see the basics of electrical engineering or 3D CAD and think that the basics are all there is to the field. It's the same as when people see a hello world or fizzbuzz program and think that's representative of software engineering before proposing no-code solutions.

Anecdotally as someone who studied mechatronics: Software engineers are far worse than any other engineering field in assuming that everything is trivial compared to SE.