I think you are correct, it is very hard to look at all the SB's and now that he has done it with his second team, in his first year there, its pretty overwhelming. While I don't think one player can be such a big difference maker in a team sport, I do believe that Rodgers has individually meant more to his team than Brady has. People don't want to look at that though, its more about SB rings, MVP titles and stats. I'm not bored enough to research this, but I bet there is a teammate or two (Gronk and Vinatieri?) of Brady's that has been a part of most of those SB's.....ok, I peaked..Gronk and V have 4, Brady 7.
Side note, Belichick has 8 rings, 6 as a head coach with the Pats and 2 as a DC with the Giants.