I think many people are strongly aware that it takes luck to climb the economic class ranks in the United States. From an individual point of view, however, knowing that may not be much impetus to change the system.
We humans can be overly optimistic to the point of toxicity. Just look at how many people walk into casinos knowing they need luck to win, and knowing the odds are stacked inevitably against them.
Yet many people keep going back.
They truly believe that one day they will luck out.
Perhaps people who fear changing the dominance hierarchy system are like those casino-goers.
They know they have it bad, and they know the system is stacked against them, but deep down inside they believe that one day they will luck out and scramble higher. And for them, that’s better then facing the fear of unknowable change.