Dead is better than a lot of things in life, I would bet. I think people feel better about themselves when they think they've helped. I was reading in WWI there were a lot of mercy killings. Today, people would send you home paralyzed, deaf, blind, and brain damaged and feel good about it. In the past, someone would put you out of your misery.
I must have misread the rescue scenario because I thought an 80-year-old guy was the victim. If it was my ex-girlfriend, though, I sure loved her but she loved sharks more than she loved me.