I certainly can't speak to other areas, and the data you present appears compelling, but in Western New York the issue of parcelization is a significant barrier to effective land management.
Grandpa Joe leaves 50 acres of his estate to each of his five children. Two of them sell their parcels for further subdivision. And the guy next door who's trying to keep invasive species to a minimum is now surrounded by untended land full of multiflora, honeysuckle, autumn olive, garlic mustard, and swallowwort. Not to speak of the dozen guys who now hunt 5 acre parcels on the border, or just trespass because they know that there's no oversight. Implementing a unified management plan with your neighbors is a joke.
I say all of this knowing full well that I am part of the problem, since all of my parcels are less than 50 acres.
The other issue is that the flow never changes direction. Land is divided, but never condensed. Once a 5000 acre farm is lost, it's lost forever. So, speaking for my area, where land ownership is likely a very different experience than many other places, though I'd expect the suburban midwest to be similar, I've got to agree that division of parcels is a big problem.