Maybe they don't need the ability to build a starship? Maybe over their billion+ year existence they're content with waiting for the occasional asteroid to blo

Maybe they don't need the ability to build a starship? Maybe over their billion+ year existence they're content with waiting for the occasional asteroid to blow them into space to the moon or mars or some other asteroid or what-have-you? Or maybe they're content with waiting for meatbags to get intelligent enough to build space ships for them? I know that we are full of bacteria, and wherever we go, there we are. So the bacteria would be there as well. I just think bacteria have so many methods of getting to extreme environments, and surviving them, that I'm not sure starships are necessary to their continuance.