Whether morality is primarily about social/interpersonal stuff or about dealing with reality effectively

I think decisions matter to different degrees, and have different like scopes of effect. Particularly, some decisions (like what to have for lunch) have a local effect – there’s no reason to think that it will have a substantial effect on your future. It’s qualitatively different to decisions that we know will have a substantial effect on your future. Those sort of local decisions are the ones that only really involve your current self. Put another way: since there’s no real impact on your future self (salad vs pasta won’t change your life much), those decisions don’t involve your future self. Caveat: habits around these decisions might affect your future self. Like if you choose KFC for lunch every day, that could be a problem.

So the definition of current/future self in this case depends on whatever breakpoint we choose regarding like magnitude and scope of the impact of choices. WRT decision making, that’s the qualitative difference between current/future self.