What? In what way? Genetically? I mean, I suppose, but do you really care about that? Passing on your beliefs / values? This rarely even makes it a single generation, and why can't you do this by simply making an impression on people around you?
I don't think anyone should have children because it helps them come to terms with their own mortality.
> why can't you do this by simply making an impression on people around you?
It's easier to make an impression on someone if you are nearly constantly around them through their most impressionable years, starting at or near birth.
If you aren't the actual (natural or adoptive) parent, the actual parents will probably get tired of you trying to do this relatively quickly, unless you have an unusual relationship with them.
I don't think anyone should have children because it helps them come to terms with their own mortality.