I'm an antinatalist. I don't think anything that is sentient (has the ability to experience) should be brought into existence. Some of the reasons i'm an antinatalist: sentience is a burden, sentient beings suffer and cause suffering, existence is unnecessary.
To let sentient life continue on, or to intentionally bring it to extinction: that is the question, whether it is better to allow sentient beings to suffer generation after generation, or to take action in order to prevent any more suffering.