Yes, Tom Brady is a great QB, but people fail to mention the excellence that his defenses and offensive lines have provided him for nearly his entire career. The Bucs were there and won tonight because of their defense. The Saints win was because of their D. The win against the Packers was because of their D (Brady was absolutely terrible in that game), and the reason they won tonight was because of their D.
But his rings have more to say about the teams he's been on, more so than his individual performances. Again, that's no knock on him. He's great. It's more of a nod to him teams than anything else. As I said, rings are a team stat, not a QB stat.