The Drake equation says otherwise. While his focuses less on intelligent life, his calculations conclude that life most certainly exists.
Although Fermi counters with the “why haven’t we found any” argument, the sheer magnitude of space supports my belief.
We’ll likely never know in our lifetimes, but I find it rather challenging to believe that Earth is the only planet in the universe with plentiful life.
“The Drake equation says otherwise.”
The Drake Equation is B.S., It seems simple with everything appearing to be proportional, But indeed they are not. The devil is in the details... It’s not solvable without making stuff up.