Backup QBs in the Loeffler Era

So, this was mentioned in another thread, but I thought it deserved its own topic, because in my opinion, it's kind of a big deal. Since Loeffler has shown up, I think we have consistently failed to even remotely adequately prepare our backup QB for game action.

Before last season, we were told there was an open qb battle in the spring-summer. After the spring, Motely was in the lead for the position, but he hurt his back during the summer and Brewer ended up winning the job. During the season, Brewer struggled mightily, perhaps due to injury. We'll never really know. The issue though, is that Motely was never ready to play or replace Brewer. He was never an option once last year, even though the starter was struggling big time.

This season, when Brewer broke his collar-bone, Motley looked completely unprepared to throw a pass in the opener. We've since seen that he's able to throw, but it's like they only prepped him to do so once it became clear he HAD to take first string reps. Similarly, Lawson has looked totally unable to or unprepared to throw in the limited action he has seen, even though he's only one play away from starting, Motley has struggled with some injuries, and he takes a fair number of hits as the team's leading rusher thus far.

Is there a systematic failure to adequately prep our backup QBs? And if so, why?