Oh maannn.....I hope that isn't the wall that you "throw darts at" (HIGH notes!)
'sides, it ain't about bein' smart or not smart. Some folks read everything they can get their hands on and forget little of it, some folks can just "look at" a transmission and know what's wrong with it, some folks have an inate sense of numbers and math... and some folks couldn't get lost if they tried.
We all have our own strengths and gifts. I'm just happy to hang out where some folks have different ones from mine!