Thank you! This is a great observation.
Yes, I have also wondered why it's a miracle that someone survives something traumatic, when the traumatic event could have been avoided in the first place. Unless it's supposed to be something that "shakes a person up" into believing, like a jack-ass-ian show of power, which just sounds cruel to me since many survivors end up with some lingering psychological issues due to the intense fear they experienced.
Couldn't the argument then turn to "free will"? That is, the argument that God is omniscient in the sense that he knows everything that can be known, but the acts of a human with free will can't be known until tested. This all falls apart if I'm mis-remembering, but I think God supposedly granted humans free will.
Now, I'm not supporting this. But weaseling is a skill I've developed, and that's how I imagine the weaseling would occur.
I guess I was interpreting omniscience as knowing everything that is, not everything that may be. I looked up the definition in the Oxford English Dictionary, and it wasn't too enlightening - "Knowing everything" - but I can see where knowing what may be would be included in "everything".