I think it's intentionally being grayed for peoples benefit. OHWM is very easy to tell on most bodies of waters I've ever been on. Even on OnX, that river is very clearly outlined ... probably by the OHWM. Anyone stating otherwise is full of it.
The hypocrisy lies in getting irritated for someone standing up for their perceived rights (peace and quiet from airboats) on their own private land, while also demanding that certain perceived rights (peace and quiet from airplanes) be upheld on their own land.
I GUARANTEE if I were to go float and ground swat ducks in the ditch that he'd be posting about how it's BS that I'm allowed to do that and ruined his morning in the blind.
Again, having hunted a great deal of sheet water and seeing the big business it is becoming, there's no way that this law stays "two feet wet"/as vague as it is.