Well, well, well. Look at the history of this rivalry and compare it with others. While ND has won more than they've lost, Purdue has had its way at times and lost some in squeakers.
West Lafayette is an easy drive or hitch hike (if you can avoid getting dropped off in Delphi, IN) in either direction.
Delve into winning streaks with other "rivaries." The fortunes of any college program, including our own (DUH!), rise and fall over time. Bob Griese put ND "in its place" three consecutive years. Look at the streaks between ND and USC. Should the Irish or the Trojans have jettisoned the rivalry when it was one-sided?
It was gratifying to be at ND when The Irish re-asserted their dominance over The Boilermakers, but it was far from a permanent condition. There's that whole "learn from history," "What goes around, comes around" and "Karma is a Bitch" thing.
Don't throw out the baby with the bath water, bite your nose to spite your face or not see the forest for the trees.