> > Most smart people are actually terrible at having the drive/follow through to take things to completion. They’ll usually want to give up at the first sign of failure or slowness.

Also, sometimes these people who don't follow through to take things to completion might "just" have something like ADHD. Struggling with finishing tasks is a very common ADHD symptom, and a good manager will help someone use the other "good" skills to compensate for such an issue. (Personally I believe the reason for this is perfectionism.)