If I then learn about timeless quantum physics and realize there's no such thing as the past anyway, and certainly not pasts that lead to particular futures, I'd settle for a world with a lower entropy, in which a relatively high number of Feynman paths reach here.

Funny you should say that. I, for one, have the terminal value of continued personal existence (a.k.a. being alive). On LW I'm learning that continuity, personhood, and existence might well be illusions. If that is the case, my efforts to find ways to survive amount to extending something that isn't there in the first place

Of course there's the high probability that we're doing the philosophical equivalent of dividing by zero somewhere among our many nested extrapolations.

But let's say consciousness really is an illusion. Maybe the take-home lesson is that our goals all live at a much more superficial level than we are capable of probing. Not that reductionism "robs" us of our values or anything like that... but it may mean that cannot exist an instrumentally rational course of action that is also perfectly epistemically rational. That being less wrong past some threshold will not help us set better goals for ourselves, only get better at pursuing goals we pre-committed to pursuing.