It's like that in engineering, for sure. My background is in aerospace and there are lots of things that a reasonably technically-inclined random can probably do passably. It takes an engineer to know which tasks those are, though.
I would imagine it's similar in law, in that it takes a lawyer or judge to know where the foot guns lie.
Agreed, and it's the same in software. Probably the biggest time-sink right now as a tech lead is people going from idea to fully-fleshed-out PR, and then having to go back to have a discussion of "was this the right thing to do". It causes frustration all around (being a "no" much more, and having someone tell you your finished work isn't valuable).