It isn't the size of their geographical footprint. Rather, it is the location. Actually, locations, for the individual practitioner: their business and their home. They want to be in a good school district that educates all its students well and sends them to good colleges? They pay for the privilege.

They want to be close to high-paying jobs? They want to be close to highly-paid homeowners? They want to be close to their own workplace? Location, location, location!

But instead of paying the previous owner, who didn't create the land value, they pay the community, year in and year out, for those services.

Makes sense to me.