His track record at the latter speaks for itself. But the fact that someone who founded a company isn't necessarily the best person to run it long term is uncomfortable. Especially on a website like this one, with so many aspiring founders.
That idea shouldn't be more uncomfortable just because the engineer is a founder. It should be reasonable for a founding engineer to let somebody else come in and do the boring management work that a CEO has to perform while the engineer continues doing the work that got them to where they are.
By "another company's obscure sports car" I assume you're referring to the Lotus Elise - arguably one of the world's better known and more successful sports cars.
In any case, the point still stands.