Would they do this to Andrew Luck? NO because Andrew Luck hasn't given anyone a reason to. But if he did, then yes, he could get benched too. In fact he'd be more likely to get benched because he's not magical.
people are crying racism saying "would this happen to someone like Brees, Brady or Manning. Well first of all they are well established over a decade and probably all 3 will be in the HOF when its said and done.
In Brees' second season as a starter (his 3rd season in the league), he went 2-9 and was benched for Doug Flutie and drafted Eli, I mean Rivers to replace Brees, but he held out for a bigger contract and they didn't feel like he was ready to start without getting familiar with the playbook and practicing.
So Brees started 2004 and led his team to 12-4 with 27 tds to 7 interceptions, and started in 2005, declining a bit, 9-7, 24 tds to 15 interceptions and in one of the last games of the season he went to recover the fumble and tore his labrum after Lynch hit him (who is blamed for the injury) but it was his own lineman that landed on him that tore it as well as his rotator cuff.
They didn't even know if Brees would be able to throw after rehabbing his injury, the Dolphins chose Daunte Culpepper after giving Brees a physical. Sean Payton gambled and took Brees, knowing that Daunte Culpepper couldn't run his offense. If he wasn't a desperate new head coach
completely rebuilding a team Brees would not have been picked up as a starter. I mean seriously, only a few players remained like Devery Henderson. The main mistake was keeping Lance Moore, a 2005 practice squad player over Mike Hass, the 6th round pick that even Reggie Bush vouched for. He got rid of the losing culture like a sumo tackle having a lazy boy recliner in the locker room, Payton threw it in the trash and got rid of him. Its also the reason for the snow patrol, linebackers no one wanted as starters.
So Brees was benched after going 2-9 his second starting season and they drafted a guy 4th overall to replace him and probably would have been a backup type that would have struggled to get a start somewhere else if things hadn't lined up perfectly after his terrible season, he would have never gotten the chance to be comeback player of the year if Rivers didn't hold out and might not have gotten a chance to start after the injury in 2005, only the Dolphins and Saints were initially interested.
Talking about DREW BREES being benched after going 2-9, picked 32nd overall (slipped due to height), after showing promise his first season starting.