And how do you know that other life forms are peaceful?
We don’t yet know that, but chances are, if they are capable of knowing about us, they may also capable of destroying us, were that the immediate intention.
Think of it this way, just as we on earth speculate about mining the Moon for elements and essential materials, so too may be the intent of ‘outside agencies’ to mine Earth.
Nothing of significance is stopping them from doing it.
In other words, perhaps we are the Goose that inadvertently lays Golden Eggs, and our planet is now being mined for various material. Organic material, that continues to grow and replace itself. The Outsiders may occasionally come into our orbit to collect and harvest various products that naturally exist upon earth, and no where else in this abundance.
They don’t need to ‘destroy’ us in order to harvest (steal) our untapped resources. Baby/Bathwatr