I actually really like to hear discussions of the Watchmaker argument and picking it apart. So, it's an appeal to the irreducible complexity argument in biology, where there are some things in nature that are so complex they must have an intelligent designer. Yet the analogy doesn't work at all. 
Because in the example, you're walking along a beach and find a watch. Based on your prior knowledge of watches and comparing it to the simplicity of the sand around it, supposedly, you can assume the watch was created by an intelligent designer. But that's a contrast that hinges on "things made by a human" and "things not made by a human". So, when making the analogy fit with "things created by God" the answer is "everything."
The complexity of a thing doesn't actually matter.
Because in the example, you're walking along a beach and find a watch. Based on your prior knowledge of watches and comparing it to the simplicity of the sand around it, supposedly, you can assume the watch was created by an intelligent designer. But that's a contrast that hinges on "things made by a human" and "things not made by a human". So, when making the analogy fit with "things created by God" the answer is "everything."
The complexity of a thing doesn't actually matter.
