Personally, a feel a well-rounded musician will carry with them a good knowledge of the tools of the trade, and a desire to learn more.
Maybe it's the hot-rodder in me, but I always want to know what's going on under the hood; be it guitars, amps, effects, and on and on.
Besides, I fail to see where this particular post got near the realm of 'technical.' That's all just basic knowledge that should be learned from the beginner stage.
A good amount of my early years of playing, I had no clue how to use pedals, or how to really get the most out of an amp... And I wasted a lot of time, I feel.
Learn. Learn. Learn. It will make you a better musician all-around.