While there may be other angles, I believe what you're replying to here is an invalid assumption regarding what "absorb shocks" and "stable system" mean and imply.
The GP seems to believe that the Earth's climate will simply revert to whatever was convenient for life while failing to understand that there's no reason to assume disruptive large-scale chemical changes in the environment can't or won't result in a new equilibrium that's inhospitable to life as it evolved for conditions present before such an event or series of events.
The GP seems to believe that the Earth's climate will simply revert to whatever was convenient for life while failing to understand that there's no reason to assume disruptive large-scale chemical changes in the environment can't or won't result in a new equilibrium that's inhospitable to life as it evolved for conditions present before such an event or series of events.