Lands are not equal. They all have different conditions. Some land for example can't grow food but is good for grazing.

Grazing, done correctly, is beneficial to the land too. E.g. grazing brings dungs to the land. The dungs give nutrients to both plants and insects. Stamping the land aerate the soil and exposes insect for birds, hence limiting pest. Birds spread seeds. Everything is in balance. Food is ultimately created from sunlight.

Industrial farming, on the other hand, simplifying heavily, is converting fossil fuels into food.