I am afraid you are more then a little wrong. For example, in British Columbia around half the lodgepole pine have been consumed by beetles. Why? Because it has not gone below 40 degC in the interior for the decade or two. Takes going below 40 degC for a week to kill the buggers. This has decimated the forest industry and put many people out of work. And this is just one example - wait until the glaciers are gone and Calgary is out of water.
Climate change actually hits northern countries the hardest. While the US might experience an average increase of 1 degC, Canada will experience an average increase of 3. And while an increase in temperature can be pleasant, if the local infrastructure and environment were not designed (or evolved) to handle it then it brings disaster. Some reservoirs go dry while other areas flood. And half the problems will be such that we can not predict them coming - like the pine beetle example.