Maybe BB took a shot on a guy with good character, work ethic who couldimprove in that area, kind of like Brady. It's a longshot, but guys that are all athletic ability nosedive when they can't handle the mental aspect, cant keep up. I think chad Pennington could have been a great QB, but he was good even with a pop gun for an arm. The list of physical specimens who couldn't run an offense is too long to mention.
Of course he was a 7th. They'll find somebody else somewhere. I think they'll rescue some traumatized young qb from an inpatient team. Teams draft QBs very high, throw them in before they're ready, keep changing the offensive system etc. It happens every year.