I think people make the assumption that aliens will be super advanced and super advanced means invincible. This comes from assuming that they will be advanced e

I think people make the assumption that aliens will be super advanced and super advanced means invincible. This comes from assuming that they will be advanced everywhere and that interstellar travel means magical tech. It ignores that there are physical limits to realistic travel or may be limits to magic ones. Finally, they can have blindspots like using cheap drones and assuming they can escape their attackers. I was thinking of scenario where sailboat drone washes up on North Sentinel Island. Our civilization is much more advanced, they can't touch our airplanes or spacecraft. The drone is advanced, with solar panels, computers, and plastic, but is cheap and disposable. The islanders could row out in canoes and defeat it with stones and sticks.