I take your point and it's a good one. But, the defensive scheme is only as good as the players trying to execute it. The Jags seem pretty vulnerable to runs up the middle. If White is effective early, they will have to re-think doubling Gronk and that could be the beginning of the end.
IF, and I grant you, that is a yuuuuuge IF, the Jags win, Calais Campbell will be the game MVP. And I agree that shutting down White and Lewis early are going to be important for the Jaguars. Belichick is not adverse to grinding out a win playing ole-timey smash mouth football and the if the Jags have a defensive weakness, it is to the running game.