I am of the opinion that life is probably common, an inevitable property of resource availability, like rust where iron and oxygen are present. I suspect it is *everywhere*.
I also think that the variation we see on Earth is an indication of both how varied life forms are and how parochial our perspective is. We live in a place that got DNA. All the life has DNA and we think that means that 'life' means DNA. Considering the fact that those lifeforms range from humans to bacteria to lichens and that we can only communicate with mammals tells me that 1) we are stuck in a local paradigm and, 2) we are not taking the lesson.
The Fermi Paradox seems apparent because we imagine that life out there resembles us but, there could be a thousand trillion civilizations of dolphins and we would never know because their life habit makes the sky and stars and radios irrelevant. There could be lichen civilizations that develop and communicate at glacial speed and, having no thumbs, don't build tools, only communicating by chemical signals.
There are forests of thousands of acres that are a, genetically, a single individual connected by their roots and chemicals they secrete into the air. There is absolutely no reason to think that the interactions among them are not some amazing form of poetry.
The final piece of the puzzle, in my view, is the fact a mobile, tool building lifeform stands a really good chance of killing itself off well before it could make itself apparent to us.
The Fermi Paradox reflects a failure of imagination based on an arrogant belief in our own superiority and importance.