But all of our climate models were dependent on the earths natural processes doing the heavy lifting, so that we could continue doing the bare minimum unabated?

Could this mean that the “most likely” 1.5-2c trajectory determined by the best and brightest fossil fuel states is actually really a 3-4c, billions will die, scenario?

Don’t worry, though. Future generations can suffer in the solace that “nobody could have predicted this”.