In game theoretic terms, there’s no reason to assume repeated play, or that one day you will be on the opposite side of the table.
Stipulating your assertion—which I don’t think is true in general—there’s also the fact that people with whom you deal once can communicate with one another, leading to the concept of ‘reputation’, which is another kind of asset. A strict but enlightened portfolio-maximizer should prefer, under fairly general circumstances, a combination of money and positive reputation to somewhat more money but negative reputation.
Stipulating your assertion—which I don’t think is true in general—there’s also the fact that people with whom you deal once can communicate with one another, leading to the concept of ‘reputation’, which is another kind of asset. A strict but enlightened portfolio-maximizer should prefer, under fairly general circumstances, a combination of money and positive reputation to somewhat more money but negative reputation.