If any of our descendants ever have to worry about their intergalactic reputations, we will have saved life on earth many times over by deflecting large asteroi

If any of our descendants ever have to worry about their intergalactic reputations, we will have saved life on earth many times over by deflecting large asteroids. In the long run, having a technologically spacefaring species is the only way for anything other than microscopic life to survive.