I think the problem with the post-Warner situation was that you were depending on Leinart, or there was a mis-communication between the coaching staff and front office about Leinart's future outlook. I think that revealed something about a dysfunctional coaching staff and front office, more than a cyclical problem that teams experience.
Guys like Orton are always available. I don't need a crystal ball to see that someone of the like of Ryan Fitzpatrick, Ryan Mallett, Brian Hoyer, Drew Stanton, Sam Bradford, etc. will be available at the start of any particular offseason and can be acquired as a starter for $5M in guaranteed money that increases to $8-$12M with playing time incentives. Orton himself was available on the eve of the season last year.
It makes no sense to me to use a first- or second-round pick on a quarterback that you don't plan to start right away. If you can't start him right away, why are you drafting him this high? The biggest value of a drafted QB is that you get four or five years of cost-controlled play out of him. If you burn one or two years of that cost-controlled play sitting on the bench, you've eroded the value of that draft pick.