You could solve it by configuring sudo to use the user's password for maintenance, but I simply prefer using the root-password for system related stuff and using sudo soley to whitelist certain commands that I'd like to run without entering a password, to have a consistent separation of maintenance-related tasks like package management and day-to-day-tasks like connecting to a network.
Therefore the idea of giving the user the option to choose the super user binary to allow flexibility in that regard. ~ Jonas
