Honestly that strikes me as a pretty fucked up and self-serving reason to have children.
You should have kids because you want to create new life, and support them as they become the best humans that they can be - not because you’re scared of dying alone.
> antinatalism, the philosophical position that coming into existence is always a harm
> a decrease in the human population would prevent a significant amount of human-caused suffering
Ridiculous. Without coming into existence there is nothing anyway - by that logic, coming into existence is always a pleasure too, it’s always a joy, it’s always a triumph and a fulfillment. Existence is always existence, nothing is always nothing. It’s a useless tautology.
If you’d rather be nothing then give up on living. I’m perfectly happy existing.
You should have kids because you want to create new life, and support them as they become the best humans that they can be - not because you’re scared of dying alone.