If you do not reproduce, the genes for which you are a transportation vessel will die with you. But that will be their fault for not being go-getters and driving the vessel properly. So it is off to eternal non-existence for them. That is, of course, unless copies of some of them are in a vessel with a better go-getter at the helm. Like being B.J. Armstrong on the 90s Chicago Bulls. A real freeloader into posterity.