>For color and fragrance, why don't we value other natural sources in the same way? Beetle carapaces or bird feathers can be colorful and all sorts of organic matter can be fragrant. But we aren't drawn to use them in the same way, for the most part.
Um, people have been using feathers for a long time. The native people of the "New World" used them to the point of it being a stereotype. Also, how much of this other organic matter have you collected because of its fragrance? As far as hard shells go, there are also historical evidence of people using them primarily as protection more than a trinket to display at home.
>When do you suppose the earliest ancestor who gathered flowers for aesthetic appreciation was?
I guess it would be after we figured out how to not live in a cave. After developing ability to communicate. After we weren't the ones being hunted. Then again, how in the world am I to know when/if the first Mr Neanderthal didn't pick a daisy to bring to Miss Neanderthal in an attempt to woo her affection.
>in that they presume that flowers in particular were already appealing.
I'm really shocked that you just cannot fathom or imagine someone looking at a flower and thinking "wow, that looks really nice. i'm going to investigate it." then realizing, "wow, this smells nice too. i'm going to pick it to share with someone". then, they take it home, and they see the response it has. The Mrs says "ooh, that is lovely." Then Mr FlowerPicker says, hey, I should do that again.
>Chimps don't do it, so far as I know. Other great apes don't
The list of things that humans do that chips/apes don't do is long, so I'm curious why this one in particular has peaked to your interest to make this point. Apes don't talk and write. Apes don't drive cars. Apes don't cook food. Apes don't cut down trees and build structures to live in. What's your point?