I don't think dead people care how long they've been dead before they're found. It's unpleasant to think about dead bodies sitting around, but ultimately not their biggest problem.
If your argument is "have children so someone will check on you when you're old", I'd argue that bringing sentient beings into the world for just that purpose is a bit overkill. Other options include: being part of a strong community, living in some sort of communal place for elderly folk, or even just some sort of basic health monitoring that can alert emergency services if something looks off.
Adopting is also an option if you're really sold on the "sentient beings" thing.
If your argument is "have children so someone will check on you when you're old", I'd argue that bringing sentient beings into the world for just that purpose is a bit overkill. Other options include: being part of a strong community, living in some sort of communal place for elderly folk, or even just some sort of basic health monitoring that can alert emergency services if something looks off.
Adopting is also an option if you're really sold on the "sentient beings" thing.