The counterpoint is that we have already seen a steady temperature rise. So even though the specifics of the various simulations might not play out as predicted we can expect temperatures to rise.
this will be the least of our problems. we understand very little about nature to have any reasonable prediction model. we don't know the inflection point which will cause massive collapse of major ecosystems we depend on.
all we know is that things are changing fast. faster than many non-human organisms are able to adapt.