I have a question about the realism of military strategy on the movie "Saving Private Ryan"?

The scene in which they are storming the beach, why would they have all the troop carriers open it’s doors facing the machine gun’s nest so the Nazis could have an good ol’ fashion turkey-shoot,wouldn’t it have been wise to open the doors facing the opposite direction and for the soldiers to stealthy climb out,it appeared to me as if their strategy was just to flood the beach with as many soldiers as possible as the Nazis could not be able kill all of them and hope the survivors could engage the enemy ?