With the following assumptions, if we aim for increasing total utility, why would we still choose to design a future with many humans instead of many many bugs?
Sentient animals’ well-being matters. (Even with fewer utility.)
At least one kind of bug is sentient.
Well-being in animals can be positive.
It will be possible in the future to create and sustain an artificial environment through a dedicated AI, where bugs will thrive, especially considering that future bugs may be digital beings.
Humans or similarly complex intelligent beings are immensely more prone to pain than bug-like beings.
To keep it really simple from my perspective only
Because I don’t aim for total increasing utility. Other things matter besides pleasure and pain.
Because I think the probability that bugs feel pain in a meaningful way is so low that it constitutes a pascalls mugging