You are missing all the second order impacts, such as conflict and mass migration.

From the Wikipedia article you linked:

> As stated, economic estimates of climate change impacts are incomplete.[31] Analysts have used integrated assessment models to estimate the economic impacts of climate change. These models do include estimates of some impacts, for instance, the effects of climate change on agriculture.[31] In other areas, models exclude some impacts. An example is the possibility that climate change could lead to migration or conflict.[31]