Those other planets don't have life as far as we're aware? If we terraform a planet to be able to sustain life, would that really be 'destroying' it?
I dont know if thats possible tho since we would have to basically remodel everything on it so we might as well just create another planet like earth but i dont think we're smart enough or have the materials to do that :/ so i think finding another planet like earth is really the fastest way to go about it. I think if we did do that and moved to another planet we would just be expanding the human population and i dont know if thats really a good thing tbh. I personally think that humans wont make it that long tho, like whats really stopping another mass extinction that wiped out the dinosaurs?
We don't even know of the existence of any planets with a similar environment to earth yet, which most likely means that the nearest one is very far away. I think that considering there's already a lot of money put into ideas to terraform mars, and how nearby it is (Which is already very resource consuming to get to as it is) we'd definitely be closer to colonizing mars than some as-of-yet unknown planet. I can't even imagine us being able to travel outside of out solar system xD
That is interesting to think about though!
That is interesting to think about though!