My current personal belief is that the universe is currently rife with life on a number of planets, but they're all so far apart that they might as well be the

My current personal belief is that the universe is currently rife with life on a number of planets, but they're all so far apart that they might as well be the only ones from the perspective of each planet. I feel that it's highly arrogant of humans to presume that "there is no other life in the entire universe, except for Earth".