You just proved his/her point, there is no beauty without humans.
The universe doesn't care about us. The universe doesn't care about the things you think are "beautiful". Tomorrow a planet-busting asteroid could collide with the earth and destroy every last bit of life on it (except maybe Tardigrades). The only thing that could possibly ameliorate that is humanity continuing to expand and grow, being a space-faring species, etc. That way some life (and therefore beauty) could be saved when we take those things with us into the stars.
Unless and until we find other intelligent species that are better stewards than us, we're all the universe has got, no matter how shit we are at the job.