The Pats* also drafted Michael Bishop, Kevin OConnell, Bailey Zappe, Jarrett Stidham, Danny Etling, Ryan Mallet all of whom failed to make a difference. Mallet and OConnell were 3rd round picks. Stidham was a 4th as was Zappe. This board would explode if we used high picks on backup QBs. Yeah they got a 2 2nds and a bad WR for JimmyG, Cassell and Brissett, but considering all the other picks, its not a great ROI
Trubisky has won a lot of games in the NFL on worse rosters than the Bills. He's not there to teach Josh, hes there so you don't have to teach him in an emergency.
I get your argument, I really do. But multiple teams with established starters and championship aspirations, including the two in the SB this year have vet backups that failed as starters (Pickett and Wentz). If you don't have a QB, you draft developmental guys. If you do, you get the vet backup. Again, JMO