Chinese large scale investments are a bit different. It’s not just SMIC who gets a lot of funding, but others as well, so they can still compete with each other, until the winner is chosen and the others fade away. Similar to what is happening in EV market in China.
Intel… there is a decent chance that company fails even after this investment. They basically need to force other companies to use Intel chips instead of competitors for them to be viable at some point.
But you also have to consider whether the government has the legal authority to make the investment. For a country claiming a limited government and the rule of law, that is a serious consideration.
You seem to be focused on the first consideration, but do not overlook the second one.
I'll be blunt - I don't think anyone takes either of those seriously, not since Wickard v. Filburn in 1942.
GeekyBear gives a less blunt similar argument: https://news.ycombinator.com/item?id=45008439