Definitely true for software. Compared to other engineering disciplines software development isn't necessarily easier but there's a tendency of software developers to overestimate their achievement. I know from my own experience that the ease with which complex SW systems can be created out of nothing is very satisfying and can lead to a positive feedback loop with a runaway effect.

When I work on EE or mechanical projects the physical elements involved have the opposite effect and create a negative feedback loop and (perhaps) lead to more deliberate development and more realistic views of the relative difficulty of the development effort. Anyone who has studied controls knows that negative feedback is generally what is wanted to reach the point you're aiming for.

A huge portion of the "talent shortage" is simply technical interviews that assume the exact opposite, and that only the best 1% of technical talent will do when you're running an ecommerce site selling unicorn horns.

This is really quite true.

Couldn't agree more!