I know exactly what you mean, and I wouldn't go as far as to label you as being a 'tree hugger' just on that evidence (I assume you mean "one who has unreasonably idealistic demands that can be easily dismissed", rather than "one who hugs trees").
I'm just saying that 'parasitism' is the wrong word. Because it is.
Biology as a discipline does not recognise the Gaya hypothesis, and what we've done to earth is not relevant if earth is not an organism.
If it were there'd be no differentiation between our use of resources and the resource consumption of other species, and everything would be a parasite. Then we'd need a new word for describing the action of what we currently call parasites.