>we can just move inland and use air conditioners
I don't think you quite grasp the gravity of the situation.
>"moving inland" throws away inconceivable amounts of wealth in property and infrastructure, markets fucked forever
>those who don't move voluntarily are forced out or die, triggering a diaspora on a level never seen before
>diaspora triggers global conflict as nations protect their resources from the desperate
>the animals don't have air conditioners, so species extinction exponentially increases and we hit a genetic bottleneck
>since albedo makes climate inherently unstable, we get a runaway warming effect that only gets worse (ice melts, more "dark" water absorbs more sunlight, more ice melts, etc.)
And that graph is not really proof of a whole lot. A period of tens of millions of years means things can adapt. This is happening within a period of hundreds of years. Shit's getting fucked real quick on that timescale. Nothing barring humans will be able to adapt, and that's assuming we don't kill each other while doing so. Plus you linked deep ocean temperature, and water is much more stable temperature-wise than land because of its much greater heat capacity.
I just wish we could discuss how we'd deal with this increasingly-pressing issue without toggling islamic gommunism. How do you address a long-term issue that does not generate a whole lot of profit but prevents the loss of great profit (and pretty much everything else)?