This analogy makes little sense. Nature is the man with the hammer. After you die he smashes your brain to bits. There is nothing left. You cease to exist forever.

Cryopreservation is an attempt to stop the man with the hammer. By preserving your brain, you give yourself a chance that you can be revived, if technology advances that far. Which certainly seems very likely.

It is a tragedy that the majority of people who die are not cryopreserved. It's absolutely silly. Even if there is only a small chance it will work, it is still absolutely worth doing.