Every move is not what it seems in kata. In other words many moves are done the same, but have entirely different meaning, which in turn changes the whole intent of any given kata. What looks like a punch, strike, kick, and block system, in order to be a complete system, needs grappling. Once you have learned a kata for face value, and it is a traditional system, and the instructor is versed in that system, you will have laid the ground work for future study in an in depth way. Instead of a hundred different moves, you will have the foundation for a thousand moves within those hundred moves, once that door of understanding has been open to you.