I’d be inclined to take the man at his word humility or not.
If he says it was a team effort, especially if he’s speaking clearly about the different aspects and who was responsible for them, I wouldn’t disagree with him. He would know after all.
I would too, but this shows something to me with respect to his ability to launch a new fab: he knows what it takes to build and work with a team of teams, all with specialist knowledge. That’s something far more important than his ability to do everything himself, which is completely irrelevant at this scale.
There are few human endeavours that aren’t team efforts. Even if we aren’t collaborating day to day, we still stand on the shoulders of giants all the time.
If he says it was a team effort, especially if he’s speaking clearly about the different aspects and who was responsible for them, I wouldn’t disagree with him. He would know after all.