There is no "real" reason why all humans on earth can not live perfectly on raw fruits.....Oranges are a crop man has learned how to manipulate/raise very well....almost as much history as the apple trees. Grapes have the longest history....
1. grapes
2. apples
3. oranges
They say the mango is the world's most consumed fruits and my guess is all the wild fruits are by far superior. I took out 2 fence rows a week ago...in those fence rows were at least a dozen mature mulberry trees.....just one mature mulberry tree will easily supply 50 gallons of fruit. These are wild trees, with delicious fruits for those living in the far northen climates...same with wild raspberries, black berries. The wild straw berries and wild grapes are small, but great.
I have zero problem with the man manipulated trees and bushes that grow larger / sweeter fruits.