You can question health for 31 other teams as well.
Who do the pats have behind Wilfolk? A rook.
Who do the pats have behind Mayo and Bruschi? an unknown.
Who do the pats have behind Brady? O'connell....
Point being everything you questioned for us applies to most every other team in the NFL as far as injuries go.
Every team does have variables. But, the Pats have fewer. After Wilfork, the Pats have Brace - someone most of us would have loved to welcome to Miami.