“Primarily the fact that there is no way for them to know where I am. And any attempts to communicate with them have failed. Space in an endless expanse and I have no idea how far from my homeworld I am. You would be infinitely more likely to happen upon one particular grain of sand on the beach than they would be to happen upon this planet among the upwards of like billions of planets in our galaxy alone, plus the planets in one of any of some-odd hundred billion other galaxies.”