The counter to that is that the defense at first sends ten players out, Then, after the first ten players get on the field, send out the last player. The refs will allow the multiple replacements and force the offense to wait until the last player gets on the field. No way, ND gets the play off in time if Kirby does that. However, since he did not know the rule, he never would have done this.
There was also no reason for Kirby to rush his team on the field. They ran onto the field as if they were the ones who needed to get the play off in time.