It's just an example to make a point. Don't get too caught up in the example.The entire Intel Custom Foundry management waiting for manufacturing decisions because the CEO is having tea with Cook?! Sounds like fantasy corporate MMORPG. All major corp CEOs juggle their time between numerous tasks. All foundries need to allocate time and focus to make sure their clients implement designs properly (more clients, more time spent with each on their products). Arguing a standalone foundry will inherently succeed over an integrated one comes down to vertical integration as a successful business strategy. Time and time again it has been shown that vertical integration can bring great advantage for those able to master it properly.
Nobody is unstoppable, whether they seem like that or not. In movies we hack and defeat alien battleships, in reality a virus from our own planet might push us back into recession or worse.
It's not a secret that a business that has a singular focus usually ends up being better at that focus than a company that has to operate in many fields. It's just business 101.
This is why one of the first things Steve Jobs did when he returned as Apple's CEO was to cut out a lot of products and focused on one or two products.