The fact that humans evolved in an environment without huge power imbalances is no more relevant than the fact that humans also evolved in an environment without huge temperature variations and yet are thriving on every continent save Antarctica
We did though, losing our fur gave us that ability and then we went all around the globe around 50,000 years ago.
Huge power imbalances, the most extreme being dictatorships, are not a barrier to human survival.
Okay yeah this is a direct response. Your claiming huge power imbalances help us survive. It’s not true though, as authoritarian states are far less stable.
Also, lots of inequality leads to fertility rates plummeting, now I’m not saying that’s morally good or not, but it’s direct evidence that huge power imbalance does affect survival negatively.
IMO the best example is climate change. With huge power imbalances, we are literally killing our own future.
Some power imbalance can work, the extreme just makes sure there is less resources for the majority to actually thrive, pure and simple.