I don't know why ETx is short on bird but Al, Ms and Ga still have them. Rednecks maybe?
Not a 'redneck' problem.
Land Holdings in much of East Texas (particularly Deep East Texas) is used primarily for Agriculture. That dramatically changes the habitat. Not that the two can't exist together, but good 'quail' habitat isn't necessarily good Cattle/Crop/Timber land. So a purposeful effort to provide/preserve suitable habitat would have to be at play.
Also, East Texas is comprised of mostly small ranches and farms. Except for 'Paper Company Land' you don't often see 'large' holdings of land (thousands of acres).
And....there really isn't any interest by most land owners to improve the habitat for sake of having Quail (or Turkey for that matter).
Then...you have the issue of 'predators'. Yes, other States (with Quail) also have some small land holdings (and also have 'predators'), and while I can't PROVE it, I'd wager most places in East Texas have more predators than many other States.
So cumulatively, it all adds up to an inhospitable environment for Quail and Turkey.
We can perhaps blame 'rednecks' for a list of other issues....but not for the lack of Quail.