My guess would be that they're in a profit vs. loss mindset and thus less inclined to be charitable, community-minded, etc. You're basically forcing them to reason purely selfishly and then wondering why they don't donate.
For instance, I wonder if (all other things aside) Nicky Case would have the same problem with Parable of the Polygons ( https://ncase.me/polygons/ ).
I think this is distinct from the cognitive vs. emotional empathy issue you raise.
