Yes, but that planning starts mentally after you've decided to have kids.
I had kids in my early 20s and I wasn't doing it for any sensible reason.
Discussion
Saying this while having kids is weird:
“I care about the short term. In the long run I am dead.”
Not weird, as we're talking about financial planning and not the intangible benefits.
Children invariably make you poorer, in the West. Dramatically so.
Most of my major life-choices have made me poorer, in the long-term, and I don't mind because in the long-term I will be dead.