Earlier quoted context omitted.
"Someone's garage" is a straw man. There must be people here who could, with adequate funding, build a smallish but viable chip manufacturing company.
There is no such thing as a “smallish” chip manufacturer that can manufacture leading edge chips. It’s about scale. If it were that easy, Apple, Amazon, Google AMD, Nvidia, etc who all design their own chips would have done it.
Companies are run to make a profit… they don’t care about sovereignty as long as the money is coming in.