* there is a finite amount of land that costs a certain amount to police
* landowners pay property taxes to cover these kind of costs to society, and land which they don't pay taxes on reverts to the state
* there is a registry of land ownership so it's easy to tell who owns a particular piece of land
* common land is at huge risk of a literal tragedy of the commons, historically through things like overgrazing (the original justification for enclosures - which absolutely were controversial at the time and did need to be empirically justified). In modern times, if one person builds a building on a piece of land another person can't. That's simply not the case for "intellectual property".
* there is a finite amount of land that costs a certain amount to police
* landowners pay property taxes to cover these kind of costs to society, and land which they don't pay taxes on reverts to the state
* there is a registry of land ownership so it's easy to tell who owns a particular piece of land
* common land is at huge risk of a literal tragedy of the commons, historically through things like overgrazing (the original justification for enclosures - which absolutely were controversial at the time and did need to be empirically justified). In modern times, if one person builds a building on a piece of land another person can't. That's simply not the case for "intellectual property".