Ray
Master Black Belt
To assume that the earth has a "correct state" just because life has existed her for a relatively brief moment of the universe's existance doesn't seem logical to me.Yes it is self correcting but the question is how severe that self correction is, basically is it survivable or not.
Someday all life will be destroyed by the heat of our sun's nova; the atmosphere will be burned off and all water will be gone.
Since during the vast majority of eternity (or the life of the universe should it have an "end") the earth will be lifeless, it only seems natural to deem a lifeless rock as the "correct" state.