Y'all cats just say shyt to say it.
You weren't paying attention to the Raptors and the Warriors before Nurse's and Kerr's respective tenures (nor are you really paying attention when they took over); you're only going off some generalized, keyboard-militant, Casual-viewer rhetoric. You're not even aware that even when Casey was coach, they were running Nurse's offense; he was one of the main reasons why Masai built a roster to complement his style, which went away from the ISO-heavy sets Casey had in place, to a more team-balanced, ball-movement, player-empowering structure.