>Stars don’t model their fusion output.

The sum total positive energy contained in the universe can be calculated and predicted.

>Interbank funds aren’t a finite commodity.

This statement is obviously false and can run into brick walls in practice.

The comparison isn't silly in the slightest. Currencies must be coupled to a finite resource to function; Lest agent A buy all of agent B's gold using practically nothing but chutzpah.

That you think the comparison is "silly" shows limited/magical thinking on the subject.