OK, and this is my point of view:
This is stubborn so-called "expert" only caring for his personal interests, disregarding potential risks (notice the word potential, I said this here a million times, Im not saying climate change is 100% caused by humans, however, it is a possibility and so it must be researched because if it gets too far we are doomed). This is the same principle as getting insurance. If you dont have one and something happens you will always be screwed. If you have it either nothing will happen, or in case something does, you are "insured".
I.e.
If there is potentially a problem lets just pretend there is no, ignore it and just in case it turns out there is let others deal with it.