It did use magic bands but specific bands. The cast at the fire house had to set up your game to go on a specific band. So if you wore a different one the next day you'd have to set up a new game. So not unlike the cards, but I'm sure they wouldn't want to be giving out cards to people to play each day.SOTMK did not use MBs (did it?), just the "key card" and then the playing cards.
The POTC game does use Magic Bands (or a KTTW card, etc) but has not come back online since COVID. I think what you are saying might make some sense for having POTC perhaps not return, but doesn't explain SOTMK.