Commercial orchards are full of carefully pruned and closely spaced trees of known varieties and the margin is still not great on fruit production. It simply is

Commercial orchards are full of carefully pruned and closely spaced trees of known varieties and the margin is still not great on fruit production. It simply isn't a good way to make money to drive all around town picking unknown variety fruits with pest blemishes from irregular trees and then try to sell them. This is why maps like Falling Fruit have been around for years and yet if you walk around Berkeley (for example) you will still see plenty of fruit on trees.