Land is rival: the owner needs to restrict others in order to not be restricted from accessing the land themself. Informational goods are nonrival: any number

Land is rival: the owner needs to restrict others in order to not be restricted from accessing the land themself. Informational goods are nonrival: any number of people can use them without obstructing anyone else's use. So normal property laws are not 'just as arbitrary and artificial' as intellectual monopoly laws: they are grounded in actual physical limitations.