Prayer May be Inappropriate
Rabbi Reuven Mann
Certain divine intervention is dependent on the level of the people. Thus, Moshe (or the people) would need to daven in order to effectuate the change in their level that would "trigger" the hashgacha. However, as Hashem explained to Moshe, ("lama titzak aylay?" , "why cry unto me?") there are certain instances of divine intervention that have nothing to do with the people. It is Hashem's will that they occur, and they will occur regardless of the level of the people. Kriyas Yam Suf was one such instance. Other examples would be the creation of the world, and the coming of Moshiach (although we can hasten the coming of Moshiach by doing teshuva, but by a certain point in time Moshiach will come regardless).