Natural disasters are short term things that can have long term effects. People plan out contingency plans, reactions, and responses to help the people who go through them. Climate change however is both a long term thing with a long term effect. Historically lasting millions of years.
It's hard to put such a number into perspective, especially when most humans can barely live till 100. Many people today will have passed on before they can see the effects of climate change or the efforts to prevent it. It's a problem where people can believe that out of sight is out of mind so people focus on the present, the things that happen more often, like volcanoes erupting or hurricanes hitting coast lines.
It's not like Yellowstone's volcano will go off in an instant nor is it so easy to prevent.
Climate change though is something people can prevent. While it might not seem like it due to changes needing time it is possible.
We can't just focus on the things happening in the present, we have to look towards the future. Some might not care since it's a future they won't be in, but that's the very reason people should care. To give the future generations something better than what they had.