I believe if life is common than there must of been at least one group of aliens that at least attempted to colonize it self everywhere in space?
Unless humans are a extreme anomaly and that most other aliens don’t really care about space exploration, and just focus on their home planet.
Seen a thesis recently that the cosmic conditions for life were extremely ripe about 10 billion years ago and we're basically living in a galactic graveyard. Which you know, kinda horrifying