I agree it is not an exact parallel, but look at what you're saying. And correct me if I'm wrong.
2012 - We had different, more important needs for our first 4th round pick, CB, ILB, RT. Instead of filling those needs we took a QB when we already have our QB in Griff. Why didn't we wait for a Kellen Moore in the 7th or the like? Head scratcher, stupid move?
Subsequently, we use the next 4th round draft pick to trade down with the Steelers. We end up with Keenan Robinson and Tom Compton, both possible steals and likely future starters.
2011 - The Patriots have more important needs than a backup QB in the 3rd round, especially with all-world Tom Brady behind center. Instead of strengthening that defense (especially since there was no free agency) they drafted a QB that was thought would probably slip into the 5th round. It was a head scratcher, but within an hour it was the best move of the draft according to the experts.
In retrospect, the Patriots had many more needs on defense than to have chosen Mallette, regardless of the previous 4 picks of that draft.
You can't see Om's original point in those scenarios?