Have a look at this video which demonstrates how really really insignificant the Earth is. It is an incredible compilation and gives me goose bumps every time I watch it.
If they are millions of years ahead of us then they can easily get through, man couldn't get off the ground 110 years ago, (wright brothers)now we can fly at super sonic speed. That's only in 110 years, think what we can do in a 1000 years. Let alone in a million.