It also should be noted that all draft classes are not equal. Russell Wilson fell to 3 in a QB class that was the best since 1983. Geno was the supposedly best (actually 2nd selected) QB in a class that was unpredictable at best. Not all drafts are equal. When people compare who got picked where it neglects context of the individual draft. The NBA draft recently had an "off" crop. Another example, Vernon Gholston wouldn't have been a top 6 pick in a normal quality draft.
No one would have been surprised if he went in the top 10, or even #1. Frankly it was more surprising that he fell as far as he did.
With QBs, it's a lot for a GM when they're drafting early. It's not like other positions that can be rotated in & out of the lineup. Take one early and you're more or less committing to that guy as your starter for at least 2 years.
As such, a guy like Wilson was a low risk, and no matter what people say I will never believe he would have been taken in round 1 in a weak QB class like this one. Never. No GM is going to do take a 5'10" tall QB in round 1 & assume that type of risk to his career. But round 3? Even if he only becomes a career backup it's not ideal but there are worse ways of using a 3rd round pick. Starting him over Flynn wasn't risky because they were both already on the team for weeks & weeks & Carroll started who he felt was the better of the two. If a prototypical QB busts it can be rationalized & you say no one has a crystal ball. But if you draft a shrimp and he isn't all that you look like the acme of idiots and you'll never get another GM job ever again, and it will be held against you for the rest of your career/life.
Geno was in between. The best QB in his class, but not one without warning signs. Would he have dropped to round 4 a year earlier? A guy who was very much talked about as the #1 pick even after the combine was over? Not impossible, but I really doubt it.
And it's only the "best QB class since 1983" based on outcome. On their respective draft days, the draft that was "THE QB draft" & the best since 1983 was 1999. Hindsight has changed the drafts' respective rankings.
But in a DEEP QB draft, one billed as being far better than 2012 (at their respective times), Cade McNown was taken 10th in the country and Akili Smith was taken 3rd overall. Don't tell me about what GMs know and what they don't.