With your attitude I don't think we would ever invent or discover any medicine or treatment. Agreed, natural systems are complicated and delicately balanced, but we have Physics, Math, Chemistry and Computer Science to help us understand those delicately balanced and complicated systems. Please give some credit to Human Intelligence that itself is a product of millions of years of evolution. I often hear people saying "X can't be done because evolution perfected it". I call it bullshit. Evolutionary systems are not perfect and can be improved with right tools and we do have the tools.