Your argument is an old and tired one. Maybe we should all be on mandatory medically supervised diet and exercise regimens, not allowed to drive, not allowed any alcohol or caffeine or other drugs. If your dream is to optimize for longevity over all else, you can do that, at home. For many people, living life is actually important, not just living long. You have no right to tell them how to behave, or to rob them of life moments because of your personal criteria you're trying to optimize for.