You may not care, yet Humans have codified an entire body of law known as estate planning to see deceased's wishes carried out. Do you not have an estate plan

You may not care, yet Humans have codified an entire body of law known as estate planning to see deceased's wishes carried out. Do you not have an estate plan on the basis once you’re dead you are beyond caring? Or do you have an estate plan but feel it is ok to violate on the basis you will be beyond caring and there is no sanctity of the dead? Why even suggest cremation? Such a preference seems to contradict being beyond caring.