grizzled;
Because the contemplation of other scenarios requires a great deal of coincidence. It is possible that a more complex , and statistically far less probable, chain of events could give the same result.
Hence your Occam's Razor approach is valid.
Just because there are 7 bodies not included in your example, changes nothing, as there will be valid other scenarios that developed following the impact the excluded them from the example.
Machinbird has also developed similar theories based on probabilities and his own forensic experience that fit nicely with the Occam approach - in my opinion.
mm43