Children are the "tick-tock-next-block" in your DNA blockchain that goes back to the beginning of life on Earth, and possibly beyond.
Discussion
The survival of your fork depends on their success in producing their own offspring, their own blocks, their own forks.
Otherwise the chain ends, and it's the end of that larger lifeform.
Heh, genetics particular to an individual water down rapidly, there will be very little of you in them in several generations.
Some things fare a little better, but if you are going to pin your hopes on worldly legacy know that all is eventually dust, even the pyramids will fade in the long run.
I'm not concerned with 'watering down'. Just keeping the chain going.
My descendants are counting on it.
It would be a shame if all of my ancestors' efforts were in vain.