Matthew,
I get in to trouble whenever I say this kind of stuff on a public forum but here goes:
Mankind differs from the other creatures in nature in that we have the capacity to care for nature. We have the ability to alter nature to suit our needs. We also have the ability to screw it up big time.
I think I am correct in saying that the position you have taken is that the best thing we can do to keep from screwing it up is nothing. Your position is valid. But to prove that it is effective would require science and a study of the effects of doing nothing.
So even in your schema there would still be a science of understanding nature and monitoring it. You would still have entomologists and conservation services. In mine there is a science of understanding nature, monitoring and protection of nature through various interventions. And of course that opens up another level of science to make sure that there are no harmful effects from the various means of intervention.