Below is a cool and very plausible video which in part discusses a possible reason why we haven't found aliens. This guy does a lot of really great videos about space. Once in a while there is something about aliens but mostly it is about realistic things, not things that have been mathematically disproved like aliens. Anyway the content of the video is really cool and nothing in it is really wrong, but there is a fatal flaw wrt finding aliens. Can you find it?