This is relative to in that the Noaic Flood and the Exodus are like two rooms of a house that stand or fall together if the foundation crumbles.
So if the flood is disproven, then the exodus would be as well?
So you are basing the reliability of an unfathomably unlikely event on the assumption of a vastly more unfathomably unlikely event?
If a nation expects to be ignorant and free, in a state of civilization, it expects what never was and never will be. --Thomas Jefferson