Think of it like the probablity theory of alien life.
With infinite worlds in 1 galaxy, infinite galaxies in a region, infinites regions in the universe...For other planets to not have life is almost impossible>Take a glass to the sea and fill it with water, there are no whales in the glass, that means that there aren't whales in the sea?
Now, think of ecosystems and the variety of them, deserts, grasslands, rocky valleys, sea, ice tundras, jungles... Sure, a lot of planets that we know have 1 or 2 ecosystems/biomes. Mars is a red desert with some icy areas, Mercury is a big ass rock, Jupiter is just gass with a bit of metal, Neptune is a big ball of water...
But then we have planets like MOA-2009-BLG-387Lb that is a literal poisonous swamp, or planets like WASP-104b that may as well be a void of darkness.
Now, let's add the probablity game to planets biomes, there is a huge chance of a planet to have a jungle/valley type environment (aka the type of terrain where hominids may evolve) and there are a few supposed planets like Kepler-186f wich is similiar to our earth but way colder (and we know that there are "extremephiles", living being that can live in extremely cold places).
So, by playing the probability game, is it possible for a hominid species to evolve and get the Sapiens status in another planet, and if that situation happened thousands of years before us, they may have evolved to a more advanced civilization, or viceversa or got extinct.