It may be the Dunning-Kruger effect for civilizations. The ones that didn't reach the stage of interstellar travel think that is trivial to travel and settle in

It may be the Dunning-Kruger effect for civilizations. The ones that didn't reach the stage of interstellar travel think that is trivial to travel and settle in other star systems. But the more advanced ones may have different ideas, or think that it is a waste of time/resources compared with some more interesting alternatives.