Kaepernick is talented enough to be an NFL backup. Statistically he’s better than almost half of the backup QB in the league, but that’s it. But there are 15 quarterbacks willing and able to play from the pocket. A few of them have even shown they can make throws from a cluttered pocket. That’s a trait most starters have and one Kaepernick is nowhere near possessing.
http://mmqb.si.com/mmqb/2017/06/07/colin-kaepernick-backup-quarterbacks