Missed on: mobile, custom chips in the data center, graphics cards, ai, and building out fab services they can sell.
Meanwhile, they took at least 5 years off of making their chips faster, and we're treated to the absurdity that the m-series chips are as performant in single core as anything Intel can build on a power budget 1/10th of Intel's.
I'm not sure what that has to do with outsourcing? It looks more like a comprehensive lack of execution.
High-end fab is a volume game and that was the time frame when Intel was still process competitive and could have competed for Apple's business (and Nvidia's, ...). But that would never happen as a division of Intel, nobody wants to send their designs to a competitor.
Intel is strategically important. As nice as it is to pretend that the whole world plays by the same rules, that the free market exists everywhere and that we'll never to to war, there are bad actors and the US (rest of the collective West as well) need to ensure that we won't be completely crippled if China attacks a single island off their coast...
Fab capability on US soil is strategically important. Intel is one of many possible routes to that.