There's a reason ZRob is an Offensive Coordinator at his age. You're looking at 3 games of a season, at the highest level of football, with a first year starter at QB.
Why don't you look at his body of work. Last year, in his first year, the Falcons had a top 6 offense. The year before, the Falcons were 17th. Before that, he spent 5 years under one of the best head coaches in the NFL, spending all of his time on offense and 4 of those years coaching the most important position on the field, QB. He may not be the most qualified, but the NFL sees enough to give him opportunities. I don't see why we shouldn't give him an opportunity, either. Especially if we can support him with a GM type role who can oversee the administrative stuff.