To expand on your point: he also fulfilled the second core competency (building the thing to sell) via sales. His ability to sell those around him on a vision

To expand on your point: he also fulfilled the second core competency (building the thing to sell) via sales. His ability to sell those around him on a vision / mission / whatever was amazing. This was demonstrated in the early years with Woz and blue boxes, the contract with Atari for Breakout, his first stint at Apple, the NeXT/Pixar years, and his return to Apple. He was able to get some otherwise very smart people around him to do a lot of amazing work (often to the detriment of their own economic/mental/physical health) Not saying I'm a fan of him for this, just that it happened and it was a significant factor in his success.