I’d argue with this some - I don’t think SJ changed “computing.” He certainly changed how consumers interact with technology... but not the science/engineering involved.
Further - Hughes DID engineering. He directly manipulated how his planes were put together. SJ certainly directed how his computers were put together from a Look and Feel viewpoint - but not the hardware/software plumbing involved.
I think your analogy breaks down there.
While Hughes may have been hands on in the beginning, it likely became more of a delegating role once WWII began. Certainly after it ended and the jet age and space race began.