Yes death is inevitable but you do have the opportunity to guide how you are going to die, to a degree.
Treating your body like a garbage dump will give you a long slow miserable death as you age as the garbage destroys your body. Eating more healthy can lessen that effect.
I would say there is still some complicated stuff going on in the brain with knowing where your arm, hand, elbow and shoulder are in space as well how much force you need to apply (the precise amount of motor neurons to activate at the exact time) so you can toss the ball in the arc you need to catch it on the other side.