That sounds like it’s talking about some version of preference utilitarianism (in which utility is defined the way economics does it, and we try to maximize the sum of each agent’s own utility function), whereas this post says that it’s talking about classical utilitarianism. I think that for classical utilitarianism, it’s enough to just know your own ideal exchange rates for different kinds of pain and pleasure, and then you can try to take actions which shift the world’s overall ratio of pain/pleasure towards something that’s good according to your own utility function.
That sounds like it’s talking about some version of preference utilitarianism (in which utility is defined the way economics does it, and we try to maximize the sum of each agent’s own utility function), whereas this post says that it’s talking about classical utilitarianism. I think that for classical utilitarianism, it’s enough to just know your own ideal exchange rates for different kinds of pain and pleasure, and then you can try to take actions which shift the world’s overall ratio of pain/pleasure towards something that’s good according to your own utility function.