Even worse, that would make us false witnesses about God, because we testified that God raised Christ from the dead. But God didn’t do that if the dead aren’t really raised.
If the Spirit of the one who raised Jesus from the dead is living in you, then the one who raised Christ from the dead will also give life to your bodies because of his Spirit who lives in you.
If no one rises from the dead, where does that leave people who are baptized for the dead? If the dead aren’t raised at all, why are people baptized for them?