If there was one "intelligent" life form per major galaxy in the Universe, the nearest one would be 2 million light years away. That would make it somewhat difficult for them to look us up.
Plus, we don't know how long technically-advanced civilizations can survive. Others could have existed in our own galaxy and gone extinct before we learned how to make wheels.
Since technological progress seems to proceed exponentially once it begins I don't think that's a concern.