For me, what’s way scarier is, it isn’t that everyone is being quiet, it’s that there isn’t any one else out there, and we’re one of the first civilizations to develop.
Why would you find that scary?
Is it because of the ‘great filter’ stuff, that there must therefore be something ahead of us in time that wipes us out (like self-inflicted climate change)? Or is it something like humans being awfully flawed to go down in universal history as the “first” intelligent and technologically advanced species? Or something else?