It may take more people, making labor an increased input. But it also takes far fewer natural or synthetic inputs, balancing out the system.

And yes, regenerative organic framing requires a lot of outdoor work without the benefit of an air conditioned tractor, but so does most of the conventionally farmed fruits and vegetables produced in the US.

They are not grains that can be harvested by just one combine. Rather, they are harvested by laborers in the fields, picking each one, and only then placing them on the tractor/equipment.