It's an oversimplification to say that Jobs died from drinking juice. There were probably many factors contributing to his cancer and I think juice was a very minor one.
Generally whole fruits and vegetables are your best option. But sometimes the convenience and availability of juice makes it a fine substitute.
Then what would be other factors?
potential factors described here:
love, love, love this talk!!!
Smoothies are great and you can drink juice but it's best to drink it right after or with a meal for good absorption, just make sure the juice is a complimentary combination with your meal.