That doesn't really change the comparison. It would be better if we made more efficient use of the wireless spectrum, but if we did then people would just repla

That doesn't really change the comparison. It would be better if we made more efficient use of the wireless spectrum, but if we did then people would just replace more copper and fiber with wireless. The wireless spectrum would still be in contention as a scarce resource in a very practical sense. By contrast, people registering every possible domain name is never going to happen. Just the computational resources necessary to do that don't even exist in the world. What makes a name valuable isn't that names are rare, it's that people know your name. Things point to it. So we don't really need to ration them but we do need to make it so that once a name is yours, it stays yours. Nobody should be able to hold your own name hostage from you.