Improbable? How can that be! If we can prove nothing else, we can prove that the probability of life forming on this tiny ball of rock around this mediocre star in the outskirts of a below average galaxy is roughly 100%. After all, we are here.
Science can show fairly definitively the method for the development of the universe from a point a few milliseconds after the big bang right up until today. And they can show that everything has proceeded naturally, according to laws of physics and biology and geology and most other -ologies, without any intervention from a supernatural being. So the most we can say is that there might be a possibility that some kind of being started the whole thing in motion but has not interfered since. But then you have to ask, where did that being come from?
As far as I can tell, the likelihood of any sort of supernatural being controlling everything is approaching zero. There are no gods.