I mean, I think it's kind of a natural reaction to "well if humanity disappears altogether, what was the point?", so we feel an urge to perpetuate humanity, in order to imbue our own existence with some sort of meaning.
Thank you for your answer. So maybe my lack of such an urge it's not about me being a sociopath or not, but a difference in philosophical views. Although gp was talking about perpetuating life itself, not humanity. Does knowing that a random organism somewhere far away it's keeping the metabolic torch lit satisfy this urge?