I think you miss crucial point here.

Terminal/CLI is superior if you know what you want to accomplish. There is no faster way of doing stuff on a computer if you know what you’re doing and having tab completion and knowing all the incantations.

GUI is superior when you have to figure out what to do and what needs to be done. GIT branches state checking, finding out a switch to enable a feature so much easier in graphical interfaces.

I find that what you call „annoying engineers” are just people who have their tools and use them efficiently … but once they have to step out of their path they become annoying or even obnoxious.

The opposite is random person who expects everything to be easy and available in less than 3 clicks — well good luck engineering an interface for complex system that does that, not everything is Facebook, there are systems where you need to spend time wrapping your head around.