My position is: even the intelligent life doesn't have to reach what some assume can be reached (Dyson spheres and stuff). We can't be sure we'll reach it until

My position is: even the intelligent life doesn't have to reach what some assume can be reached (Dyson spheres and stuff). We can't be sure we'll reach it until we reach it. Don't forget, there's enough nuclear weapons to roll us back to the prehistoric levels of existence. Don't forget the climate, etc. Before we land on any planet around any other star or have some other kind of proof, don't assume others do trivially. And, even if the advancement is probable enough, be aware that the other civilizations don't have to have good intentions. Better avoiding signalling around.