Or do you think Tatupu calls his own defenses and runs the practices?
Also you could see from the beginning of the Rothlisberger "TD Run" play that Seattle didn't have enough defenders toward the left outside of the Steelers offensive line.
These misformations were due to coaching.
#28 failed to contain the outside on a few plays and also should have knocked down the Rothlisberger scramble and chuck pass that went to Hines Ward for a big play.
There were a number of plays with poor defensive containment of the outside, including the reverse to Hines Ward. Usually this is the responsiblity of the defensive end and/or the outside linebacker.