Which part? That is a bit to late or that sasuke doesnt care? If its the former then sakura moving on is pointless, the damage is already done to her character and to her daughter, if its the latter then him apparently not knowing his own daughter and being absent for over a decade speaks for itself(not to mention hes still travelling in the film and sarada says he hates that he never explained why he was never there in one of the movie promos).Can you prove that?
But i dont really care for this argument and wont further pursue it, so believe what you please.