Ayn Rand is an interesting figure. She doesn’t know that optimum strategy is is often mixed strategy. In fact, certain strategy is hard wired to be fixed that you can’t even rationally override that. A sample, would be the gender of your children.
She’s not aware of evolutionary psychology where instincts guide all living things to profit far more than rationality. In other word, she is a good philosophers, but even she can only go so far.
Her idea that selfish means capitalistic selfish is simply wrong. That’s why she has a hard time explaining all those other people that behave differently than how she thinks. In her mind, it’s the majority that’s “wrong”.
First of all the issue is not the homo economicus it self but how it is interpreted.
Humans are homo economicus (rational selfish), in a sense that stones are stonyeconomicus with the additive inverse of potential function as utility function.
The theory that stones want to minimize it’s potential energy correctly predict stones behavior on free fall and slippery slopes. The problem is that it’s simply not true. Stones do not have a will, let alone rational. If you interview Mr. stones, do you really rationally want to lower your potential energy, the stones don’t know. “Potential what?”