Many a coach falls for this. It is often a nerd like OC/Head coach who sees a fellow nerd as QB and picks him over the block head. Makes sense, as the dude has to know the playbook and defensive schemes, right? Great in the film room, but a different on Sunday when the brain stops working due to the fear of a DL/LB trying to paste you into the ground.
Don’t quite see RR or JDR as a defensive nerd, so I have no idea why the love for Bostic.