Dierdorf was so wrong. That safety on the botched punt snap was actually the best thing that could have happened to the Pats on that play. If the kicker somehow managed to down the ball on the 1 or 2, the Colts almost surely would have gotten a touchdown which would have meant 5 more points than the safety for the Colts. Even a field goal would have given the Colts an additional point. With the safety, the Colts got only two points and after the Pats' kick, had to start their drive on the other side of the 50.
The play was inadvertent but it was the "smart" play. Dierdorf struggled to try to figure out how say the Colts having the ball on the 1 or 2 was a better outcome for the Pats on the play. Dan must never have seen teams who are kicking from deep in their own end zone, have the punter just step out of bounds.