OK, how do you expect people to farm and ranch if you don't allow farmers and ranchers to live on their land?
You can solve one problem by mandating universal veganism and banning the keeping of pets which are obligate carnivores (cats, mainly), but that just increases the demand for farmers and farming.
You can solve one problem by mandating universal veganism and banning the keeping of pets which are obligate carnivores (cats, mainly), but that just increases the demand for farmers and farming.