All righty; I run my utility function over everything that exists. On most of the existing things in the modern universe, it outputs 'don't care', like for dirt. However, so long as a person exists anywhere, in this universe or somewhere else, my utility function cares about them. I have no idea what it means for something to exist, or why some things exist more than others; but our universe is so suspiciously simple and regular relative to all imaginable universes that I'm pretty sure that universes with simple laws or uniform laws exist more than universes with complicated laws with lots of exceptions in them, which is why I don't expect to sprout wings and fly away. Supposing that all possible universes 'exist' with some weighting by simplicity or requirement of uniformity, does not make me feel less fundamentally confused about all this; and therefore I'm not sure that it is true, although it does seem very plausible.
On most of the existing things in the modern universe, it outputs 'don't care', like for dirt.
What do you mean, you don't care about dirt? I care about dirt! Dirt is where we get most of our food, and humans need food to live. Maybe interstellar hydrogen would be a better example of something you're indifferent to? 10^17 kg of interstellar hydrogen disappearing would be an inconsequential flicker if we noticed it at all, whereas the loss of an equal mass of arable soil would be an extinction-level event.
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