The political climate is just an obfuscation. The electorate perceives the change to be too costly* and the climate risks to be too remote to justify this cost. The problem with reports such as these is that they always give you the big picture but do not directly relate it back to the individual. If people's home insurance suddenly jumped up 1000% due to recalculated natural disaster risks, that would suddenly make people rethink their positions.

* I am actually not convinced either way. Some people believe it is so expensive it will necessitate degrowth, while others think that so much economic change will almost certainly spur economic growth. Either way I think that people who push the degrowth narrative are further reinforcing the view that climate action is too costly. Nonetheless it could be that they are right.