I mean, we're talking of millions (billions potentially in the future) people out of their homes, horrible droughts, famines, fires, weather phenomena, animals extinct, etc, so skiing is the last thing to concern with...
Of course there would be negative consequences for mountain villages and such. But ski tourist industry decline is not the biggest tragedy. These people are indeed forced to leave their Alps village but they can still go get some job in the city in a first world country. That's versus millions of third world immigrants or dying kids in Africa/Asia due to droughts/climate change developments for example...
In any kind of difficult situation, prioritising is crucial.