It would be that weather and plant cycles are probably more random and iffy than being able to hunt the many forms of meat in a region so the diet was higher in fats and meat, fibrous green vegetation versus high carbo grains and starchy tubers. Once the women learned(females tend the hearth and prep food more than human males) to replant the seeds and saw that the plantings would regrow in the same location, I’m for sure planned crops in a static location(modern farming) started happening.

I just find the subtle need to push vegetarianism as the core(real=pure=true) diet of homo sapiens a contrarian fad trying to denounce previous findings of carnivorous/scavenger high protein diets as what helped tick off the growth in higher brain tissue development in simian groups. Apes turning to pure vegetarian diets are a regressive evolutionary turn based on the high availability of vegetable matter for energy in forested/tree environments that orangutans and gorillas live in. Chimps, baboons and early humanoid species lived in arid to lowland grassy/forest areas and shores, where access to dense caloried diet sources of meat and seafood were available through scavenging or hunting. Thus omnivorous/carnivorous like diets were the norm.

IMHO, Massive despoiling of the countryside for a pure plant/vegetarian diet is just as bad as thousand acres of cattle belching and pooping on deforested acres. Monoculture food systems to feed an endless growth population demand will never be sustainable or environmentally sound.