The Herald of War
Well the premises are pretty shady.
Why in the world would something some of us do somehow define ALL of our nature? Since when did the popularity of a particular motivation somehow upgrade it to the nature of everyone?
How have you determined that this is the motivation of people? Maybe they personally want kids and the propagation is merely a by-product.
I'd say it's something most of us do. The choices humans make today most likely differ from the choices made by humans hundred-thousands of years ago. (I say "likely" because I don't want to make too strong of an assertion.) I'm glad it does not seem you think popularity is necessarily a fallacious thing. Or it appears that way to me. So if I may, I'll say
originally, propagation was the means for survival, so self-termination would not be viable.
With this shift where we as humans have civilized in almost every part of the world, perhaps propagation is no longer the reason why self-termination would be considered unreasonable. No doubt, some do these things for reasons, which others might find unreasonable (such as to preserve honor, or to protect loved ones, &c.). Perhaps I will reconsider. Thank you for this discussion, The Herald of War. It has been a delight.