There are probably hostile civilizations out there, but if humans are any indication, there are also friendly and funny ones too. I'm beginning to lean towards the most obvious solution to the Fermi paradox: viruses. Viruses can quickly wipe out a civilization, just look at what this relatively weak coronavirus has done to humanity. There is more where that came from. If a local virus doesn't wipe out civilizations in a planet, then an alien virus could. So making contact makes no sense at all. It's best to keep each other at a distance.