There's also analog fabs, MEMS fabs, LED/photo/laser fabs.
Places like Analog still have smaller fabs like that. Those fabs also seem likely to create technological progress into the future, and so the US should be funding those too.
Micron is still pushing DRAM and NAND tech but it's more for cost cutting since they are strictly commodities. The work it takes to be a pure-play fab like TSMC is pretty different - lots of working with fabless vendors to bring up their chips. Even Intel isn't any good at this (yet). It's a collaborative process.
At their tech level there's probably hundreds of companies with fabs[1]. GP was explicitly talking about cutting edge fabs.
[1] https://en.wikipedia.org/wiki/List_of_semiconductor_fabricat...
I'm no corporate apologist but the current mess is the result of a government policy designed to encourage globalization. An American company that builds stuff here will always be at a competitive disadvantage versus a foreign company that builds stuff using dramatically cheaper labor.
So I don't think it's really correct to think of these subsidies as "rewards" - it's done strategically to keep American manufacturing alive.
I would suggest that the real alternative is not to fund the smaller companies, but to simply nationalize Intel.