But the environments that they evolved in and the environment we evolved is completely different. Earth to them would be unbearable for them to live on, and any

But the environments that they evolved in and the environment we evolved is completely different. Earth to them would be unbearable for them to live on, and any resource they could possibly want would be readily available via asteroids. One last thing is the biology of Earth would most likely be toxic and incompatible with their biology.