In camp it is absolutely vital for him to test the offense and make mistakes. When else is he going to do that?
mini camp isn’t exactly the time. You’re too busy installing the offense and learning it. Plus you aren’t in pads and you aren’t flying around.
Preseason games won’t work either bc nobody throws many blitzes at QB’s and everything is vanilla.
Training camp is the best and only time for this guy to learn on the job in a game setting with pads. Now is the time to understand what the defense is doing and seeing what throws you can make, plays you can execute etc.
or would you rather just start having him learn week 1?