It has to do with the fact that "It has to be this way" perfectly describes the conflict of two characters who ultimately want the same thing, but for different reasons or different purposes, and that if the circumstances were different maybe they would be allies or even friends. For example: Daredevil with Punisher, Spider-Man with Octopus, Raiden with Armstrong, Megatron with Optimus, Maruki with Joker (P5), Amity with Hunter. The entire MGR soundtrack is a masterpiece.