"I want to get the work done, I don't have time to look through the documentation to find some new command". If you think like this, you will get stuck in the stone age of computing. Some people use Notepad for everything, and then wonder why other people get their work done in half the time...
It's not directly related to vim, but... Some tool you use will always seem extraneous to someone further down the stack with more experience than you...
I remember at the beginning of my coding career asking a software engineer what IDE was the best and getting back the answer, "you don't need one, you can do everything in NotePad if you want."
(Suffice to say the impetus to go home and want to start coding from a blank NotePad file that night was dead on arrival.)
Now, if he had asked me why I was asking what IDE was best, I would probably have said "I want to create something as quickly as possible that helps me understand what code does," and then I would have been off to the races. Googling and learning along the way...