If we're going to bring up stats and talk about the "whole picture" of his play, then let's bring up who his receivers were in 2015/2016. Top 2 receivers (by receptions).
2015 (Kap started 8 games, Gabbert started 8 games): A 35-year old Anquan Boldin and Torrey Smith. Smith was 2 years past his prime 2013 season, and never recorded more than 500 yards after this season, with 3 different teams.
2016 (where Kap started 11 games): Jeremy Curley and Quinton Patton. Curley would be out of the league 2 years later, never to be a Top 2 receiver again. Patton would never record another stat again, ever. Not sure if he retired or just hit the bench.
I'm just bringing up stats for arguments' sake, because I hate when people act like he was shitty. I think it's a weak argument and uninformed. However, I actually can agree with the fact that maybe a few GMs actually think he's a league-average QB, and probably worth starting over a few starters right now, but I don't blame them for one second in not wanting the headache and/or distraction. He can be a backup-worthy QB and still not be worth the headache, I understand that.