Can I, just a random citizen, get a loan from the government for not even billions or hundreds of millions but let's say $100,000? I will of course repay "in due course, at the appropriate juncture, in the fullness of time" [1], at 0% interest.

There is nothing loan-like in government "loans" (of 2008, or of 2021, see the PPP heist [2]) almost by definition: no interest, no shares changing hands, not even a share buyback restriction (how most of the government loans are spent anyway).

[1] https://www.youtube.com/watch?v=iKYEUXlYcSI

[2] "How Did PPP Scammers Steal $100+ Billion", https://www.aura.com/learn/ppp-loan-fraud