I personally don't feel compelled to help non-existing people accomplish their goals.

I suspect that this has something to do with the fact that I seem to mostly care about things which activate my empathy, all of which have physically instantiated qualia (happiness, pain, etc.) that I care about, or are highly anthropomorphic and fake that effectively (like Wall-E).

Since non-existing people don't physically exist, I have yet to feel bad for them. This could just be a failure of my moral circuitry though, sort of how if I never found out about starving people in Africa, they wouldn't interact with me in way that would make me feel bad about them. However, I am confused about how mathematically specified but non-existing people work.