Assuming an engineer doesn’t know what to make is illogical.“Figuring out how to make something is one thing, figuring out what to make is a higher level function.”
Therefore it took an engineer to know to make the iPad. Which would imply that Steve Jobs was an engineer.
Wozniak was an engineer. Jobs, like Gates, was a salesman. What’s the difference you ask? Jobs without Wozniak sells used cars. wozniak without Jobs is still a design engineer who designs and engineers.