There really is no reasonable argument that there is no other intelligent life in the universe besides a purely religious one.
If you hold an article of faith that God made one and only one creation like us, then fair enough.
But if you think the human race and all the life on earth evolved because of our conditions here, then it has done it hundreds of thousands, or even millions of times. And we will never meet them, not even once.
The universe is simply too big. Like one grain of sand on a beach, looking for a few specific grains of sand somewhere else on earth. That’s way too small an example, but its the best I can do.
“But if you think the human race and all the life on earth evolved because of our conditions here, then it has done it hundreds of thousands, or even millions of times.”
Nonsense. Evolution doesn’t deal with the problem of where life came from, only what happens to life once it already exists. What you are speaking of is the notion of abiogenesis (life arising from non-living materials), which is not a scientifically established idea, but mere speculation at this point.