Quite intangible. Insofar as our genes want anything they want us to reproduce but they do so by nudging us in the general direction of reproducing, not, in most people at least, by the conscious wish to reproduce.

Humanity won't go extinct if you don't have kids. What you do is not what everyone else does. Example: If everyone had 3 kids then earth would quickly become overpopulated and billions would starve. But that doesn't mean that there is anything wrong with having 3 kids today.