Wouldn't you have to simplify the environment enough to make us all better optimizers than the FAI? Otherwise, we won't feel like we are struggling because the FAI is still the determiner of our actions.
Some people want to make a choice but don't want to deal with the cost of making that choice. For example, some couples want the choice of signing up for a prenuptial, but prefer not to have to make that choice. They would prefer that they would have to sign up for it. Making the choice may make the spouse angry.
I think people believe economists are all leaning towards libertarianism and republican. In reality, they are mostly democratic.
I believe the irrational part is that the consumer would buy more meat depending of how scarce the information of scarcity was. For example, consumer overheard the butcher talk about meat being scarce so the consumer buys 8 times more instead of 4 times more (if the scarcity of meat was common knowledge).
Rather than pursuing every mystery, I think it's more important to remember you always have the potential to unravel it yourself (with a fulfilling journey). Even if you end up never pursuing a phenomenon, I still believe you can benefit from acquiring this mindset.
We share an evolutionary history with different animals on earth. There could be attractive properties in animals that give us a similar representation of sexiness as they do to their own species. Same reason we find you will find different creatures finding other creatures cute e.g. humans to dogs and gorilla to human.
Additionally, there has been cases where dolphins attempted to sexually engage with humans. An intelligent alien will have a shared ancestry and therefore will not have sexiness representations from "sexual properties" exhibited in earth's creatures.