They can do it for a time.
Apple can then use some of the hundreds of billions they have on hand to prop up one of TSMC's competitors, as they did with the RAM suppliers.
Who, Samsung? Somehow I don't see Apple doing that. It's not a particularly populous industry; no other foundry (ignoring the blacklisted Chinese companies) but Samsung, TSMC, and Intel is involved in sub-10nm lithography, to my knowledge.
True, but hundreds of billions can get you a lot, when your main business is affected.
Intel would probably be keen.
I would love to see Intel buy Intel's fabs, glofo or something.