Yes, motivated people will try all kinds of things, but that's not guarantee for success. And usually we're talking about problems at a completely different scale, how we deal with one like this we do not know but if the pandemic is any indication then you have a nice sample of what a response could look like and how effective it will be.
The big mistake is that we try to solve global problems with local control.
Plenty of people already currently die from poverty, disease, lack of sanitation, poor nutrition, and conflicts. So maybe the number of these preventable deaths stays about constant as poverty improves but climate worsens?
No. If you start forcibly moving people in those numbers out from some of the real estate that we've invested 100's of years of hard work and income into then that number will not stay about constant. These are the most productive parts of our planet that we're talking about.
