Why shouldn’t we colonize other planets?
Why shouldn’t we play God and put life on other planets that could support it?
Why don’t we move there as well to heighten the chances the human race will live on if something happens to our home world?
Why do we need an explanation to explore when we have never needed one in the past?
Because if we treat other planets like we have treated Earth then it will be only a matter of till we run out of planets to live on and then we will finally go extinct
But there is hope all we have to do is learn how to live on a planet without destroying it but will that ever happen given human nature?