Freyaka cited Plunkett as a "backup who won a SB," but he wasn't: He was a BUST #1 overall Heisman winner, whose irresistible college career and blinding talent doomed him to be drafted by the Patriots in the middle of their 40 unbroken seasons of utter ineptitude. So after five years of shellshock they dumped him on equally awful SF and moved on to Steve Grogan, who made about as much difference as Tony "I was drafted right after Kelly and a dozen picks before Marino" Eason after him. The '9ers gave him two years, then dumped him on Oakland a year before replacing him with a 3rd round pick named Montana. But the combination of the '70s/80s Raiders elite offensive line and restricting Plunkett to just 15 passes in two years (NONE his first season) ultimately healed his body and mind enough he was no longer scared of his own shadow—because he no longer had to be. By no coincidence, he suddenly started looking like a Heisman winning #1 overall pick: At age 32.
Was Heisman winning #1 overall pick Vinny Testaverde better than "bust" QB Steve Young? Tampa sure thought so when they booed that bum out of town for losing so many games they got the #1 overall pick in '87, but they traded Young to a HoF career and soon put up billboards mocking Testaverdes colorblindness before dumping him off to be a journeyman backup his whole career.
This is what happens when bad teams fixate on QBs; most alarmingly, that's a great example of the kind of systematically bad decision-making that made them bad teams in the first place. Fire all the employees, gun down all the customers and burn the company to the ground, then when the top CEO you hire to fix all that CAN'T he's an overhyped bum, so it's on to the next scapegoat. Maybe the best fastest way to find a great QB cheap is to wait for the perennial losers to dump their latest 1st round bust for whatever pittance they can get; they do it almost annually, so you needn't wait long. But you'll still have to give him the supporting cast (both coaches and players) to succeed or nothing will change.
Meanwhile, everyone convinced "no one can win a SB without a great QB" will remain equally convinced that Namath>Unitas>Morton. Oh, and Kenny Stabler and Terry Bradshaw were better than Fran Tarkenton; even though he had all the records, they both beat him AND the Purple People Eaters on SBs, and that's all that matters.
Jim McMahon, Phil Simms and Doug Williams are great QBs, because mediocre QBs only win SBs on the strength of great Ds once a decade, maybe less, but those guys won THREE IN A ROW; just three years later, Simms broke his foot in Week 14, so the great Jeff Hostetler led the Giants to another SB win. Trent Dilfer and Brad Johnson were great too: They won two SBs in just three seasons, and it certainly wasn't because great Ds carried them there despite utterly lacking a great QB, because that only happens once every ten or fifteen years. Anyhow, that was waaaay back in 2002, when SBs were broadcast in black and white through soup cans connected by string, and dinosaurs roamed the Earth; everything's different now.