Replace "patent" with "parcel of land". Now how does it sound?

What bothers me is that selling a parcel of land is easy, but invalidating the sale requires a "principal officer" and is treated as a huge infringement on property rights. What about the rights of everyone else, who are forbidden from using a parcel of land by the land owner? Isn't that a much greater infringement upon liberty or property, than invalidating the sale of a parcel of land?