"Except for the resulting 43% fall in paracetamol overdoses. It's saved close to 700 lives so far."
Not the conclusion you can draw. Just means 700 people haven't used that method - you don't know they haven't picked another option.
Although I would say (as noted by someone above), it's a particularly long, painful and irreversible way to go, so perhaps they were just trying to spare people that.