Doctors, based on my limited understanding, are becoming more and more pragmatic about using checklists in surgeries. I am not a doctor, nor am I an expert, I have just read some interesting articles and heard from surgeons that they are trying to improve the process to reduce careless mistakes.
No clue about lawyers.
So processes can actually be incredibly useful, and oftentimes are designed after the fact. Agile has some neat ideas as well, but in practice I'd say 90% of the time it's pretty fucking terrible and the company would be better off without trying it entirely. Not because agile is bad, but because the people in charge of agile are usually bad.
At the end of the day it comes back to something I've learned painfully time and time again throughout my career. No matter how talented you are, you are powerless against a shitty manager.