First, I don’t think omniscience is relevant to the discussion.
Second, if we were omniscient (in a strong sense–i.e., we were capable of evaluating the astronomically huge number of choices available to us), we’d be able to choose exactly the course of action that resulted in the maximum possible happiness in our lives. Whether we took that action would depend on the strength of our meta-processor, I suppose, but it seems likely that we’d end up making ourselves extremely happy with such knowledge.
Well, yes–but if I offered to bet you a million bucks based on the outcome of a rerun game, I bet you’d watch it then, wouldn’t you? And that’s the difference: the omniscience you’re proposing would allow us to make unbeatable bets. It would be an amazing stimulus pushing us toward good behavior–because we’d be aware of exactly the good behavior that we were going to engage in and the happiness that would result.
You may be proposing an omniscience that is not itself a stimulus that changes behavior–that we’re somehow made aware of the effects of our choices, but our processing module isn’t allowed to take that awareness into consideration in making those choices. That’s a contradictory scenario, and not how our brains work. We make choices based on the knowledge we have.
Again, though, I don’t think omniscience is that relevant to discussion, since none of us have it or have any idea of how we could get it.
Because you’re human, and you’ve probably got an empathy processor in your head, because that’s a pretty strong adaptive trait for a social species with a long childhood. You care about the child because you’ve evolved to care about the child.
And there’s nothing wrong with that. We evolved to care for those that we consider to be part of our circle. That circle may include our immediate family, our tribe, our nation state, our species, or every living entity on the planet. And this caring for our circle results in greater happiness for everyone, and the more that we expand this circle, the more pleasure it creates in the world.
Why would knowledge of this adaptive trait cause you to reject it?
Daniel