This is really apples and oranges. Just because something is highly improbable does not mean that it is not common. Meaning highly improbable things happen everyday. If I have 100 die and roll them the result will be highly improbable but that same low probability will happen every roll.One example is a statistician said the probability of life occurring by chance is the same as a lightning bolt striking A junkyard and when the smoke clears finding a fully functional B-52.
Anyway however you want to look at it, we cannot just assume a creator without sufficient evidence. Maybe there is a mechanism for life starting that we don't know about. You need to give sufficient evidence for a creator before it can be accepted.