[bigtex88]

You're missing the main point of Georgism. The main thing is that community-derived wealth (i.e. the value of land, not the value of the property on that land) should be redistributed to the community, as the community was the one that caused that increase in wealth.

Someone can maintain a piece of land unproductively if they want to. They just have to pay for that right, same as anyone else that would want to own that piece of land.

There is a broad range of situations here. No one should want a blighted property just sitting there in places like NYC or LA where homelessness is rampant. However, no one is arguing to just teardown places like Central Park to put in more housing.