Jobs often set project goals well beyond current technology, and the people around him were responsible in actually getting product out the door.
replyNaively asserting stuff is "Shit" and firing people that disagree with you on superficial deliverables is not a difficult role. However, teams pushing new technology out to the general public is challenging, and even Apple gambled on the wrong product at times.
Jobs was right about a lot of marketing trends, but also was a controversial character. I would recommend watching the classic interview just prior to his return to Apple, as it aged well... =3