No @amwassil I do get what you are saying.
What I don’t accept is the idea that during the time when the evolutionary lines of homo sapiens separated from those of the great apes those proto-humans did not eat every available source of food available to them.
I am not envisaging parties of ape-like women and children out with baskets gathering fruits for preservation, rather nomadic peoples picking the berries and nuts which they passed by and eating them as they travelled. The plants have also evolved over time in order to facilitate their own reproductive interests. In order to attract wandering mammals and birds they have made their fruit a bit brighter and sweeter. Of course, selective breeding of plants by agricultural humans has altered the fruits even more.
That we have the metabolic pathway described by Gary Fettke suggests to me that there was most likely an evolutionary advantage in having it. So dismissing the idea with “Sure, that would be nice!” makes me think you are not feeling receptive to the idea that plants have much of a place in the human diet.
For what its worth, I hardly touch fruit these days but consider it would have been a useful resource for my lean active ancestors.