What is the cost to adopt to a warmer climate?
Coastal cities will require either abandonment of infrastructure due to rising sea levels, or expensive mitigation. In practice, probably both will happen.
We'll see farming being no able to be profitably done in many areas, and will require new farms to be developed in areas where the climate is now more adaptable. That is going to be costly and disruptive as well.
We'll see massive migrations of people, both internally and internationally, as some areas decline and other areas grow due to the climate changes. That is going to be disruptive and costly.
And there's political concerns, as these changes will result in some countries losing power, and others gaining power, changing the balance between them.
Not to mention concerns at the personal level - even if your current location is going to survive climate change, there will be changes to heating and cooling requirements, and disruptive events like floods, extreme weather, fire and landslide danger may change for you. What happens when your flat land becomes more prone to flood due to weather changes, or your hilly land becomes more prone to landslides due to vegetation changes?
I do agree adaptation is going to have to be part of the solution - there's too much climate change already locked in. But we better realize that there's going to be a pretty big cost to most of us.