Regardless of whether he really is that deluded or not, what should he do? It's just as easy to imagine his company dying by playing extremely conservative and clutching on to the "golden goose" for dear life. That's what happened to Blackberry.
And yet Microsoft is still ... Microsoft. Oracle is still Oracle. Whatever you think of them, they didn't decide to rebrand their whole company to go all-in on something that ended up not being that strategic. And no one can say they haven't been chasing that next thing.
I don't expect them not to make big bets, but this was DOA from the start and everybody knew it.