That is not true. There are plenty of ways not to reproduce and still to perpetuate your genetics. For example, if you don't have children of your own, but support people that have similar genetic traits to your own.
If they aren’t your children they aren’t your genes.
"but support people that have similar genetic traits to your own."
but how its that works then??? does that mean your genetic trait is already there in the first place
if its already there in the first place there must be something that start it now right, which basically counter your argument