My point basically boils down to this, we obviously don't want to continue this trend for the next 100 years. But you could also make the argument that if we could make the planet hotter by a few a degrees and put a cap on the increase in heat, the rest of the planet should naturally become more amazonian/african habitat. Which I don't see how that is necessarily a bad thing considering that is essentially how nature is designed to balance itself out.

To understand the consequences of global warming to the fullest its worth pointing out that we need to understand how ice ages can occur and dissipate in the first place. In that phenomena we see that there is a natural balance that is occurring where nature has a way to modulate exorbitant CO2 output of animals in relation to the plant life. When trees grow in abundance and there isn't enough animals to breath o2 and produce co2 obviously the planet eventually over thousands of years grows so cold that plantlife gets concentrated to the equator. And then with evolution animals get bigger and more plentiful and therefore starts breathing more of the o2, producing more co2, the point being there has to an inequality where animals per mass consume more O2 molecules as a biological function than a plant consumes CO2. (which kinda makes sense if you think about the whole "circle of life" of cellular biology.)

That is the only way such climate changes could occur when the planet's orbit never changes in distance from the sun.

These climate changes occur reeeeeeally slow and of course that means its in an intricate balance with the slow process of evolution... but still with that being said we assume climate change is going to be a calamity only to us, but that doesn't mean its going to necessarily be something that the earth isn't already very well prepared to resolve on its own after were gone. And if it can save it self, that means we can just make sure we save ourselves by burying fallout esque vaults under ground, or going to Mars.