Let's not fool ourself if they discovery avoid your wife or husband or child to die before you, I think anyone will sign "yes".
Also, everyone fear death, it's easy to say to be a part of the cycle but man, i don't think everybody is going to smile when they die.
I can imagine it would just prolong our life making it seem to be everlasting until our bodies eventually break down from extended use.
I agree with you but not with the part where the body will break down because if you can stop to age when you're twenty or thrity, there is no reason that your body will fall appart by itself. This happen only when you work like a slave and eat like a poor with a meal every 5 days.