“Never been on a cruise, have you? “....
Yes, more than enough to know that designers COULD introduce more positive passenger protections but as has been previously stated, “Where’s there a will there is a way”. The majority of deaths such as has been described happen for one of two reasons, homicide or suicide, with suicide the number one.
At what cost? Railings on cruise ships are about 48 inches high. They could raise those to 8 feet, enclose it in plexiglass, and destroy whatever pleasure you get from having a veranda with your cabin. A big part of the pleasure of a cruise for me and many people is sitting on the veranda with the sun on your skin, the breeze in your hair, and listening to the water go by. Why take that away from the hundreds of thousands of passengers who aren't there to commit suicide?