It's tragic that only the threat of a deadly disease could compel such a change, but perhaps we may find other levers to help us achieve such widespread beneficial changes in the future?
A total shutdown of the entire world economy on an unprecedented scale still doesn't track enough to prevent climate change.
If that isn't a clear indicator of how severe the situation is then I don't know what else is.
The idea that you can gain anything from denying climate change and skip out on preventative measures is just wrong. The economics alone tell you that this is a losing play and I am not even talking about the impact on the climate, just the potential for economic growth that you end up denying by denying climate change.
But I've spent a good deal of time studying game theory and situations where the behavior of the whole is significantly dumber than the behavior of each individual actor, because the individual actors' interests are not aligned. I think global warming is going to be one of those. Sure, if we could come to a rational collective-action agreement, we could solve it. The history of collective-action as a solution is pretty dismal.