Hope is a good thing. That said, I would imagine people's reaction to you talking about the singularity is that you're giving people an excuse to not do anything to improve things NOW, because there will be this deus ex machina event in our future that we can rely on that will fix everything.

There is also the thought that things will get worse so quickly as to logistically prevent technology from moving fast enough to affect things like the environment positively in our lifetime.