From your provided link and reply:

"Wild/Natural Fruit: Small, high in fiber, often sour, bitter, or even astringent; rarely sweet; usually low sugar level."

The link I provided presents a pretty convincing demonstration this is a patently false "truth", using both current day examples as well as macro-nutrient analyses. You have not provided a link to information clearly showing wild/natural fruit is "small, high in fiber, often sour, bitter or even astringent; rarely sweet; usually low in sugar level." when compared to cultivated fruits. Rather, you've linked to one man's opinion/"truth" he based on—what?—a reference citing sweet oranges don't grow wild and are from sour oranges + regurgitation of current dogma. Okie dokie.

If you start with a false premise, kinda hard to find your way to a right one. As such, I don't have the time to parse the rest of some dude's dogmatic opinion. If you do find a page with relevant information demonstrating wild/natural fruit exhibiting the proposed traits on actual analysis, I'd love to see it so feel free to link to such.