I think there is intelligent life out there, but every type 1 civilization has a choice to work Outwards or Inwards. Inwards is AR VR, basically Simulation building and living forever inside a simulation that just keeps going forever. Or Outwards that’s Type-2 so that means building a dyson sphere or such…. which seems pretty much harder and it is much harder to do, rest aside we settle our differences here on our planet. Maybe, every Type-1 civilization chooses The Inwards choice and they just go into forever immortal sleep. And because of that argument, we can’t prove or disprove that, that hadn’t already been done before. I believe there is a great chance that we might already be inside a forever immortal sleep fantasy RPG called “Life”.