I just believe the other people in the ring matter a lot too.
So do I. And Tom, more than any other quarterback, understood this too. His leadership, willingness to take a financial hit to get the right roster around him where every other qb takes the money, his calm head in the face of sometimes historical adversity, his elevation of average talent, his appreciation of the greater talent he worked with, his research and the groundwork he did before playing opponents, his ability to remain healthy and hungry for 20 years.
You were right when you said a QB can only influence so much, but Tom optimised his corner of the game in a way no other quarterback ever has. He did it with all his work on and off the field to make the teams around him better, and he constantly put himself in a position to capitalise when his defence made big plays. You think him winning 7 Superbowls was just an incidental quirk of the teams he played for, but there's a good reason he was the constant in all those great teams when so many other players came and went. He mastered every aspect of being a successful, winning quarterback on and off the field, winning an unprecedented amount of Lombardis in the process. That's why he's the greatest without being the most accurate passer or throwing the tightest spiral
And he did it for 20 effing years