Uhhhhh...but no.....
“Uhhhhh...but no...”
Logic is not on your side here. The fact is, there are more suns in the universe than all the grains of sand on Earth, and most of them have planets. The number of potential planets is incalculable.
For life to have formed on only one little rock, in all the unimaginable vastness of the cosmos, is simply ludicrous. In time we’re going to find that it’s out there, and that it’s everywhere.