As has been pointed out already, Darwin saw this obvious point way back in the day. And yet even now, creationists use "Why doesn't this a happen all the time now?" as a snare for the unwary (the REALLY unwary). You could hardly ask for a better illustration that the purveyors of anti-E nonsense are selectively blind, ineducable, and incorrigible.
Well Jeepers Vade, some people just can't read. (This is directed a class of people who consistently misinterpret the words of others. It is absolutely not directed toward any particular individual.)
I'm not aware of anyone on this thread who ever said or implied that Darwin belived he had the answer to the origin of life. I can't imagine why anyone would think this is a topic of discussion.