That seems to be the point the parent is making. Tautology is the the only way we can explain the way life happens to be -- it's because it's advantageous for it to be that way.
It should also be pointe out that about two thirds of human conceptions result into early embryonic death, so evidently it is not as smooth a ride as suggested.
That's a little bit tautological since if the genes didn't work together they wouldn't be here after all these years, right? Fascinating nonetheless.