I don’t think US’s power is because oil is traded in dollar, rather the other way around. It is because people believe in US, its economy and its political stability that they use the dollar. And its not just oil either. Most commodities are traded in USD. If you want to move away from USD, what is the alternative? Yuan? Rouble? Rial? Yen?
As for the BS about regime change for trying to move away from USD, its just fluff. A misdirection to make people not think about real problems, like basic freedoms.