The penalty for attempted robbery is less than it is for a completed robbery.

If I go stab my neighbor 15 times planning to kill him and due to the skill and hard work of a team of doctors he survives why should I benefit from that when my actions were the same regardless of whether he survived or not?

Shouldn’t the actions of the criminal determine the severity regardless of things that happens that is really out of his control, such as doctors saving the life of your victim? What do you think?