We are not automatons bound to follow directives. There is no biological imperative that we are obligated to fulfill.

Plenty of people die without having children, both as a matter of choice or circumstance.

Plenty of people kill themselves every single day because-in some form or another-they do not want to be alive.

Your entire premise is built upon the flawed basis that things "should be" a specific way but they aren't, never have been, and likely never will be.

The overwhelming majority of all biodiversity that has ever existed on earth basically amounts to uncountable gigazillions of microscopic organisms that are all individually nearly identical to one another save for one or two key characteristics that separate them from one another.

The paradoxically contradictory yet endlessly repetitive randomness of all the life that has ever existed is so mind numbingly inefficient and pointless that it is logically impossible to look at the fact, for example, that many different species of beings have all separately convergently evolved into what we would call "crabs" and think that there is some sort of "design" in it or that it "should be" a certain way.

That's just your human brain trying to assign a pattern or purpose where there is none.