It is good for the developing world, as producers/exporters subsidize countries with reserve currencies. That's why inflation in countries with reserve currencies is always a way lower than other counties. MMT claims that one can swap "printed money" with real products (such as cars, commodities, food, clothes). This kind of swapping is possible for the US, EU, UK (Mostly the Western world and Japan). Who wants to swap million barrels of oil to Zimbabwian dollars.
How is USD better than Zimbabwean dollars after the US federal reserve has quadrupled the amount of dollars in less than a year and then claimed only single digit inflation?
EDIT: I love how nobody replying is addressing my actual point
Perhaps in a theoretical sense they aren’t different, they are fiat money which is basically a ledger of value (which governments manipulate).
But behind the dollar is the largest economy in the world and the largest army by a long shot, and a lot of motivation to keep the dollar as the “biggest” currency in the world.
It could be worse, it could be better. All that it matters with currencies is trust. Trust that they can be exchanged and trust that they keep their value. If I go shopping tomorrow and they tell me, you can keep your euros and your dollars, we want only bricks because currencies are crashing and bricks will be useful forever, I better have to get out and find some brick. The dollar is fine until people will trust it.