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.
An interesting bit of info to add to this is that Earth is as almost 1/3 the age of the entire universe which is kind of a lot when you think about it. We really just might be one of the first ones.