The zombie apocalypse is upon us! No, the undead are not out to consume the living. Rather, there are so many that everything is in danger of grinding to a halt.
A person that does not care is dead while they yet live, hence a zombie. They move and breathe, but nothing is better for it. Instead, things are worse, because they are using up precious resources.
Zombies do not even care for themselves, leading to all kinds of health problems. The stench of death follows them: it is a rotting from within. Yet these things shamble about, taking up space.
All of this is unnecessary. Life is about living and doing and being. If a person is truly alive, a living death cannot claim them.
Indifference will spread until only a husk remains. Not caring is a slippery slope: you stop caring about others, stop caring about yourself, and then the body eventually succumbs. But everyone around you suffers in the meantime.
Live while you still can! Every breath is precious, and not to be wasted. Be the person you were meant to be. Let death be merely the end of a fulfilling life.