Okay fine. Let's say offense is 50% of the outcome. Is that all on the QB? The playcaller, OL, WRs, RBs and TEs are just there watching the QB play? Probably not. Peyton Manning, who in his prime was ahead of the game in terms of doing things pre-snap, might have been responsible for 30% of the win/loss outcome. Current QBs like Goff who get audibles in their head set might account for 10-15%?
Anyway, the specific percentages can be debated, but those details don't matter too much. IMHO wins/losses is not a stat that should be attributed to an individual. It's a team game and no one person single handedly wins or loses the game. Looking at yesterday's game Kirk was good enough to have them win that game. Sure he could have made a few more plays, but overall he was good.