Practically, I agree with you but the definition of a Central Bank Digital Currency is a currency issued by the country's treasury. Maybe they come up with some hybrid scheme where the Fed will credit Circle's accounts and then they print more USDC, but that would for sure require legislation and be an immense responsibility given to a private company.
DAI/USDS are what you're looking for in a permission-less stablecoin, but unfortunately the founder has back peddled to chase making money over principles. I believe folks have been turning towards a project called https://www.liquity.org/ but its no where the size and pedigree that MakerDAO was.
Yeah I want to, and been discussing it with my FIL, but I've been having a hard time finding what hardware would be best. I used to mine Ethereum back in 2017.