But how about Steve Jobs? Didn't he single-handedly create tens of thousands of jobs when he invented the iPhone and iPad? After all, no one even knew they wanted an iPhone or iPad before Steve and Apple invented them.

No, Steve Jobs didn't create those jobs.
Steve and Apple did invent a couple of awesome products that about a hundred million people have bought, and he and his team deserve tons of credit for that.
But they didn't create those jobs.
How do we know this?

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First because, if the 100+ million people who bought iPhones and iPads had not been able to afford iPhones or iPads, Apple wouldn't have sold any of them.

It doesn't matter how much "demand" is created by a product that is so awesome that everyone wants it. If no one has the money to buy it, they won't buy it.