The fundamental problem with moving to a new neighborhood (Mars, Europa, Gliese, Proxima Centauri) is that we bring the age-old problems with us. If we have a severe stomach ache in the kitchen, merely moving to the dining room isn’t going to help.
Unless we can make radical changes in our amygdala, we will continue with our Earth-threatening “us versus them” mentality, with catastrophic consequences for life on Earth. Religious, racial, ethnic, gender, sexual preference, and age differences are used as excuses to get into battles and wars, and for what?
So, while it’s true that we are facing the danger of planet-wide doom in five billion years, I would argue that we first need to reduce or eliminate the primitive brain functions triggered by our reptilian brains, or we will all be doomed in the very short term….