The Secret of Fire

If we really do have exotic materials, bits of spacecraft from aliens, it begs a few questions. Why are they so shit at flying? That's honestly question number one is how is it possible for them to travel as far? Are they just in their early days of NASA phase of reaching out to other inhabited worlds where they found us? I don't know if they would travel that far. They might just be sending over little probes or drones or something. And maybe as the years go by, their shit gets better. My imagination goes crazy though. So that's why they're just killer bugs though.