I agree with most of this response.

Gravity is not a theory and neither is evolution. There are theories that try to explain both of them but gravity and evolution are facts. Masses attract, we write laws that approximate those actions that let us put things in proper orbits and other practical things based on underlying theory but gravity is a fact. Darwin had a theory that is yet to be proven. The fact is species evolve, viruses evolve. Evolution is a fact. The origin of the Homo Sapiens Sapiens is still being explored, the facts are still in question.

MMT might be the best economic theory but it can only be used as a guide within the limits of its assumptions and yes it does have significant assumptions. Has anyone created the math to use for modeling transactions under MMT? Documented the assumptions, assigned the constants and variables? I have yet to see any economic models that approach the accuracy of the models of gravity. Models that involve the actions of humans have never demonstrated great precision.

MMT suggests that if we do x the result will likely be y but you can be certain the result will be z because MMT cannot predict precise outcomes. It does not account for all the significant variables.