The problem is fruit picking, where one object (say, a strawberry) must be detected and picked individually without damaging the object or the plant.

cannot be mechanized

Let's just say "cannot be mechanised until such time as we produce a robot with as good object detection abilities as a human". Such a robot does not yet exist, even in the best computer research labs, and they're getting military-industrial money. Agri-business is unlikely to significantly enhance this research, even if it needs that ability.

Graham.