i find it very amusing to imagine a rabbit wondering if the rabbit should never be born. And i think this goes to some of the failures of utilitarianism, and that to deal with with sort of arriving at repugnant conclusions. It's often the case that utilitarians need to import non utilitarian ethics,. Non utilitarian ethics can have things like qualitative differences or natural order.
Neuroscientist Erik Hoel talks about why he is not an "effective altruist" with EconTalk host, Russ Roberts. Hoel argues that the utilitarianism that underlies effective altruism--a movement co-founded by Will MacAskill and Peter Singer--is a poison that inevitably leads to repugnant conclusions and thereby weakens the case for the strongest claims made by effective altruists.