Maybe NinjaCoachZ is working under the belief that a Sorceress literally cannot die without passing on their powers. So Rinoa would be potentially starving to death, asphyxiating, dying of thirst and so-on for the rest of eternity.

It is kinda brutal.

Of course we all know Rinoa didn't suffer that fate. She returned to Earth and got a spiffy castle with its own clock tower and everything.