I think you're overestimating how much people take climate change in account when discussing the future. Not many people think long term about such issues and their higher-order effects. At best, they're parroting what the media says about resource wars and other issues (in the case of climate change) or "a future without jobs" (in the case of AI). It just isn't a prominent subject; this implies nothing about its relevance (or lack thereof). If you follow the subject and discuss things about it, you tend to think about things the average person ignores. Those who have the singularity in mind aren't special in that regard, as people who study or are interested in other fields (immunology, genetics, energy, etc.) tend to feel just the same about people ignoring the importance of present and future changes.