<< What about a two year old squished by a car? Ageing did not kill him. >>
Since ageing is such a slow process, it can happen that its victims die due to other causes. This does not mean that they've escaped their fate. It only happened a bit faster.
Those who manage to survive all other dangers in life will die due to ageing. It (ageing) is thus 100% effective.
Pretender, after an organism leaves the womb or egg, it continues to grow for a while. When this grow slows down, the decline starts.