I strongly oppose the notion that you're not a full member of society without kids. That's an unnecessary attack on a valid lifestyle choice. And even worse, a lot of people don't even get to choose, which you're ignoring entirely.
Yes, a (developed) society needs about 2.1 children per woman (or have immigration from other societies) but people not having kids can easily be averaged out by other people having three or four kids.
I would actually argue that in the face of climate change, a society having too many kids and thus a growing population and resource usage is disadvantageous for the society's survival.
Surely potential breeders should be more deserving of membership than those that are no longer capable?
Further, surely rapists are more deserving that abortionees?