Based on the names that you supplied, I'm guessing that you assume that MMT is a left-wing idea. I think the bigger reason to pay attention to it is because it has support on both sides of the American political spectrum. Read The Macro Tourist's post [1] for a pragmatic trader's take on the matter. He also suggests that Trump is already an implicit proponent of MMT, what with his increased spending and decreased tax revenue.

[1] https://www.themacrotourist.com/posts/2019/01/23/mmt/