Your argument collapses the moment you pretend draft position determines greatness, because if that were true, Tom Brady would have been irrelevant, Patrick Mahomes would not be better than Mitch Trubisky, and half the league’s best players would not even exist. Matthew Stafford spent 12 years in Detroit dealing with bad ownership, constant coaching turnover, weak defenses, inconsistent offensive lines, no run game, and almost zero depth outside of Calvin Johnson, yet still put up elite numbers and elevated multiple average receivers into career best seasons. And when you cherry pick his 2021 interceptions, you conveniently ignore that he threw for 4,886 yards, 41 touchdowns, a 102.9 passer rating, finished top three in yards and touchdowns, then followed it up in the playoffs with 1,188 yards, 9 touchdowns, and only 2 interceptions, including clutch wins over Tampa, San Francisco, and Cincinnati and the game winning Super Bowl drive with no run game and no OBJ. That is not winning in spite of him, that is winning because of him.
Meanwhile, Dak Prescott has spent his entire career behind elite offensive lines, with dominant running backs, stacked receivers, a weak division, and still has not reached a Conference Title game or Super Bowl or delivered consistently in big playoff moments.
Saying Stafford needed help is meaningless, because every champion quarterback had help, and no Rams quarterback won before him even with Aaron Donald anchoring the defense. Football is a team sport, not tennis, and pretending Stafford was supposed to overcome a dysfunctional franchise by himself is just moving the goalposts.
The reality is simple: Stafford carried broken rosters for over a decade and still produced like an elite quarterback, then immediately won when he finally joined a competent organization, while Dak has had every advantage imaginable and still keeps falling short, so if anyone failed to elevate, the evidence points in one direction, and it is not Stafford.