Sorry to dredge up old comments, but my best guess for Iger's swift exit in 2020 was he foresaw significant impacts to earnings across the business lines and most likely his compensation was tied to the stock price. If you knew your earning potential could be halved due to a virus, why not leave and lock in the gains from an impressive run?
Completely agree. The model for tech companies who are disrupting an existing business model has been to get funded and be subsidized by investors until they grow and dominate said business model and then they'll get to virtually dictate terms and profit in a near monopoly once the legacy companies are defeated. That's why as cord cutting accelerates, Netflix is putting hammer down on account sharing, soon to be follow by Disney+.
Disney has been designed basically as a circuit of content, where studios make movies, that move merch, that get spin-off TV shows, which have ads for the next movie, and the parks having all of it trickle into it. Disney+ is a semi-replacement for the TV spoke of the wheel, but now they, as all the other companies quickly realized, that it's not as profitable as the traditional model.