That’s a good point. It is the case that preferences can be about an indefinite number of things. But I suppose there is still a sense in which a preference satisfaction account is monistic, namely in essentially valuing only the satisfaction of preferences (whatever they are about); and there is no equivalent sense in which objective list theories (with more than one item) are monistic. Also note that objective list theories can contain something like the satisfaction of preferences, and as such can be at least as complex and ecumenical as preference satisfaction views.
That’s a good point. It is the case that preferences can be about an indefinite number of things. But I suppose there is still a sense in which a preference satisfaction account is monistic, namely in essentially valuing only the satisfaction of preferences (whatever they are about); and there is no equivalent sense in which objective list theories (with more than one item) are monistic. Also note that objective list theories can contain something like the satisfaction of preferences, and as such can be at least as complex and ecumenical as preference satisfaction views.