Save you from what? The ones in the US can barely fit down the aisle. Any real problem is handled by the pilot,
Save you from what, seat belt unbuckled, cell phone on, smoking in the head? Any real problem is handled by the pilot, airport security, or a few passengers onboard. The ones in the US can barely fit down the aisle. They are waitstaff with little other skills otherwise there would just be a couple air marshals on board.