Exactly, you got it. If oppo man mark nothing will change, instead it will be worse for him cause with this player positioning i basically " fix " the postition of his players, his MC will stick with MC , his DMC will stick with AMC etc.. i have total control of what sopt will be free and what spot will be occupied. With MTM oppo players will have to move and change who to mark dinamically and it his during this phase my team will find the " hole ". So either Zonal or Mtm the logic is the same.
Think about how semi-conductors work
you leave a spot and come to my spot = you leave a space and it become free to get occupied , do this till the DC will move out of his position -> free space for another player to get there and have a chance to score