

That’s an important part of it. Let’s say half of it. I’d say the other half is zero-sum thinking about literally everything. If they see someone receiving help, their brain is screaming at them that those resources could have gone to them instead. I think it presents more as a strong feeling of moral right and wrong. They will never understand equity when their brain is tuned so badly wrong.
We even have trouble with cultural shit within our own species! Smiling like that all the time would warn me away and I’m from a culture that generally likes smiling. In our closest living genetic relative, the chimpanzee, a toothy smile means “I’m ready to tear your arm/balls off.”