Do you think E.T's would help us out if......?

Yes. It's the zoo scenario, discussed in chapter 3 of the reference. They keep us as a nature preserve, just as we keep lifeforms we call primitive and try to help prevent unnecessary extinction of species. We are under observation. We are worth studying, just as we think ants are worth studying. We don't find them because they don't want to be found. UFO's represent leaks in the embargo.