yes, nature would find a balance. i totally agree. but if we stopped making franken food and pharmaceuticals and all of the other things we do to keep people that would normally never have even been born, much less alive, living... nature would find its balance. through death. people would starve to death, bodies would pile in the streets polluting the water and spreading disease and killing more. animals would form packs, killing each other and humans alike. nature is not a kind place. while beautiful, nature kills. it is not rainbows and unicorns. and yes, I agree that nature will take over again.. but in nature, humans usually eat meat. and we didn't eat grains up until recently. that's the truth. humans eating meat is not destructive. it is how we evolved. you would not exist if humans had not consumed meat.
while i would like to see far more nature than we have today, i'd like to see it through voluntary human actions such as green energy and a movement toward organic eating and natural healing... meditation, etc. not through nature finally retaliating in order to create balance again.