Do you think that Steve Jobs was the entirety of Apple's QA and decision-making process? Far too much good stuff has come out of Apple in the past decade for Steve to get sole credit. While Jobs obviously had the power to veto any bad idea, he didn't have the time to veto every bad idea, or to suggest every good idea. He can only micro-manage some of the things some of the time.

He built and trained a system that, even with Steve still running it, is obviously capable of making good decisions without him. He may have been the primary motivator for the development of the iPad and iPhone, but he didn't create OpenCL, libdispatch, CoreAnimation, and Automatic Reference Counting. He didn't invent the unibody construction process or Gorilla Glass or LightPeak or multi-touch, and he's obviously not the only person at Apple who can recognize their value and figure out how to use them to make a better product. If that were the case, he would have been a huge bottleneck and Apple would never be able to ship more than one product a year.

You're confusing leading by example with doing it all yourself.