The enormous turrets on an Iowa class battleship rotate very slowly, requiring about 22 seconds for 90 degrees. Here however, it turns sideways in just over six.
Nathan James fires 6 TLAM at the airstrip in Cuba but didn't think about doing the same to Camp X where the team have been pinned down for days? Easily within range and accurate enough to just take out the gun towers and breach the wall, it's inconceivable that a team with the combat tactical experience they have gained over the past years would not have considered that option.