Jobs came for a different era too. An era where things where more scarce due to pre-internet structures. It might have been difficult for him to think '1000 songs in your pocket' would end up as an generalized addictive stream of pages and sucking peoples attention instead of helping good human contact.
It's always the same butterfly effect, when you put something in the world, it might really succeed at that but you never know how the system will grow around it. Kinda like this static1.squarespace.com/static/527deb7fe4b009d7ee74d609/t/54f93e21e4b025c50f0e090c/1425620525003/avoiding_pain_desire_path.jpg (well far fetched analogy tbh)