By utilitiarian you mean:
Caring about all people equally
Hedonism, i.e. caring about pleasure/pain
Both of the above (=Bentham's classical utilitarianism)?
In any case, what answer do you expect? What would constitute a valid reason? What are the assumptions from which you want to derive this?
Both of the above (=Bentham's classical utilitarianism)
I mean this.
In any case, what answer do you expect?
I do not expect any specific answer.
What would constitute a valid reason?
For me personally, probably nothing, since, apparently, I neither really care about people (I guess I overintellectuallized my empathy), nor about pleasure and suffering. The question, however, was asked mostly to better understand other people.
What are the assumptions from which you want to derive this?
I don't know any.
If it's worth saying, but not worth its own post (even in Discussion), then it goes here.