Intel did not do a good job with its (sizable) investments for the last decade. There's little reason (at least for me, a casual observer of their failure to deliver good chips) to think they would have done a better job by just throwing (more) money at the problems they were trying to solve.

The existence of markets Intel didn't dominate does not, to me, imply that it would have been a good use of resources to throw (more) money at the markets they didn't dominate. Not every company is good at every business, even if they dominate some seemingly related market.