I'd be pretty impressed if somebody could grow in vivo tomatoes efficiently. It's really hard to beat leaves and roots for nutrient and energy absorption/conversion. I've seen warehouses of plants growing, about the best people can do right now is flowing nutrient solutions directly on the roots.

Photosynthesis is actually fairly efficient.

As for the whole cells-are-state-machiines, while that's technically true, the state vector has a trillion parameters.