Hollywood action, sci-fi, and neo-noir movies were huge in Japan in the '80s, that's why there was a lot of manly men leaving rivers of blood in their wake from the enemies they punched to oblivion, voluptuous beautiful women, and post-apocalyptic dystopians rivaling Mad Max in manga and anime back then. Some of them are still popular franchises to this day to keep that testosterone flowing, but that idea of a sex god Adonis power fantasy has been replaced with the wimpified high school senior boy #9254 somehow still surrounding himself with a hot harem who won't let him touch their boobies without getting smacked and/or humiliated we see today. Also the isekai changed.