Reproduction

I'm just curious as to why at this time and age, people still care about procreating, I mean it's practically one of the major reasons people stay in their straight phase especially men. They are so obsessed with bringing children into this world that nothing else seems to matter, not even themselves. Why is this so important, they don't care if the world isn't safe enough for the children they are bringing, they just go on with it like their lives depend on it, they care more about leaving someone behind than taking care of their fellow people. Is it not just tiring please?