Any decisions that would affect their trajectory will get a ton of deliberation from a lot of smart people; i.e. there wouldn't need to be a ton of input or ingenuity from the CEO to see returns like those from Apple, imho.
Not to say that Cook isn't great or that it wouldn't be difficult to achieve that success.
But that sure didn't last.
Of course you can argue that the wrong leader would have torpedoed the company.