All the evidence that we have says we are alone in the universe.
If anybody has any evidence to the contrary they haven't produced it yet.
If the universe is finite then there will unique things in it. Life on earth may be unique.
The universe is a pretty hellish place for life.
That is not what all the evidence says.
It is true we have not found evidence of life yet but we are only barely getting a glimpse beyond are own world. What we do know is many many worlds exist beyond are own and we keep finding worlds CAPABLE of supporting life. As it turns out planets hospitable to life are common.
Combined with the math it is likely to the point of being a certainty that life exists on other worlds.
We have absolutely no evidence that there is life on any place other than earth. After many decades of serious research we have not been able to turn chemistry into biology in a lab.
The more we learn about earth and the more we learn about the rest of the cosmos the more learn that earth is not like other places. The universe is very hostile to our understanding of life.
Statistics don't produce life. In order for any statistical probability to be valid we need more than one data point. We only have one data point. Until (if ever) we get another data we have absolutely nothing.
We have been brainwashed by 100 years of Science Fiction. We are absolutely positive life exist elsewhere because we see it on TV and the movies and read about in books. However, the scientific reality is much different.