/setmaxplayers 30 is Brocken

The "/setmaxplayers 30" command only work which cheats on. Whilst this is a command, it doesn't change the game in any critical way so it isn't cheating to have many players. This should work without cheats as well as with cheats. It isn't cheating so it doesn't matter if we use the command on a world with 0 cheats.          Thank you for your time