it muddles class realities by suggesting that "we" could print money to pay for things that "we" want while nudging class rule and dollar imperialism behind the sofa.

Can you elaborate? Because this is a very contrived view of MMT, which is essentially just a lens into understanding how money works.

Michael Hudson has written a lot about this in his books Super Imperialism, Killing the Host and Destiny of Civilization.

marxist spaces are brimming with well-read people whose eyes roll back in their head when someone's naive enough to give mmt a sympathetic treatment

You do realize that MMT is derived from Marxism, right?

Michael Hudson is a Marxist. Minsky (Stephanie Kelton’s PhD advisor), whose work formed the foundation of MMT, was a Marxist (confirmed by Hudson).