You should really see just how much processing goes into the meats, produce and carbs.

Factory farming predominantly uses nutritionally deficient grain and corn to quickly fatten up the livestock quickly, before slaughter and often quite extensive processing to keep the meat looking pretty and last longer.

Produce is picked long before its ripe, and forced to ripen, which as a process, doesn’t let the produce develop the full capability of nutrition.

As for grains all the nutritionally useful stuff is ground away for the nice white grains and flours we use.