Comment by CyberFonic

Selling the vision is both an in-house as well as marketing aspect. When you have hundreds of people working on the product design and realisation, the CEO has to figure out how to make payroll, keep investors happy, get suppliers to extend greater levels of credit, ensure that manufacturing ramps up. Successful CEOs are not micromanagers. Steve Jobs is well known for providing scathing feedback, but not for actually sitting down and sketching out designs.