I agree with your theory accept by the time we develop technology like that we would probably all be dead because of pollution. Adding to your belief the reason I think it is possible because of Dark Matter and Dark Energy. The reason I think this is because it makes up 94% of the whole universe, but it is not know what it is. Right now there is a theory going around saying with it messing with the gravity and things like that is can heat lonely planets. Lonely planets are planets that don't have any stars to heat it, so it makes more planets to be able to hold life. I found this answer in a few minutes, so if I am wrong please correct me.