It made no sense to have a boat, with dozens of oarmen, and getting all your soldiers seasick, when you could just march your army across dry land to invade your enemies. I mean, what the fuck? Or if enemy ships decided to attack, you could just part the seas around them, trapping them in place until they fucking starved to death, or surrendered. For the Mole People to take this military miracle with them was an insult to Great Egypt.