Saying that Rupp has committed to an event and will therefore run it is like saying you entered the lottery and therefore have $10 million in the bank.
"DNF Galen" is only marginally more likely to race events he enters than events he doesn't.
Look at last season. And the season before that. And before that. In fact, has he ever gone a season as a pro WIHOUT scratching a race? Doubt it. But then, he's never won a major race either.