If you look for yourself, you can see that not nearly All WMA are National Forests.
And, if you want to be wordy about you'll see that Nearly any of Mississippi WMA lands are National Forest.
Lots of different entities at play. Some even private people that don't use the lands taking a tax break on it by the state. Also, several corporations doing the same thing.
Do 5 minutes of research for your self before you believe someone's else's agenda.