Most people have no concept of how an automatic transmission works yet they know how to drive a car. You don't have to study physics to understand the laws of motion to drive a car. You don't have to understand any of this stuff to use Macintosh.
I wouldn't change one thing about my professional life and I make it a point not to dwell on my mistakes.
Everything's coming up roses - for me.
You do have to change things as warfare changes.