I have observed that design in general, and user interface design in one specific, is a bit like coaching a sports team or being a stand-up comedian.
Many people in the seats are certain they know better than the coach or are funnier than the person on stage. Their certainty lasts right up to the moment when they actually have to demonstrate their presumptive skills, at which point they learn that making it look easy is very difficult.
The same presumptive expertise also surrounds the field of technical writing, a.k.a. documentation. No shortage of soi disant experts in the figurative seats, but ask them to provide an example of how it ought to be done and suddenly they become too busy doing other things…
Cheers & play safely,
Riley
SFO