> Are all reasons that you'd expect to hear. Citing climate change as a reason seems unreal. The difference between climate change and the other things you ci

> Are all reasons that you'd expect to hear. Citing climate change as a reason seems unreal. The difference between climate change and the other things you cited is that "climate change" is easily externalized. "I can't have kids because of my unresolved issues I should be working on" implies a burden of action. "The world is ending because other people suck" is a much more ego-saving answer.