Right, but we don't know that the force was applied solely to the hip, and I guess I'm just using the MOI to state not the assessment (which, I would still do anyway), but to show that a large amount of force has been applied to the patient regardless, and though my assessment may find no broken spine or neck, I am not an x-ray machine, and if someone fell out of a car and broke their hip couldn't I assume that (even if my assessment didn't physically feel it upon palpation) enough force was applied that there is still a risk, and precautions can be taken? I'd rather take the precaution than have to explain why I didn't take precautions, right?
You might want to review the NEXUS study and look at radiography accuracy vs physical exam accuracy for C-Spine injuries (hint, the X-ray machine doesn't win). The "not an x-ray" excuse doesn't work when you look at the data.
I'd rather not put the patient through an uncomfortable, painful, needless and potentially harmful procedure "just in case". I could intubate everyone "just in case" but it's not called for, harmful and would get my card pulled. If more medical directors would start looking at spinal immobilization as an intervention that needs to be justified (which it is) rather than a something we do "just in case" I'm betting the number of times a spine board is used pointlessly (most of the time) would go down drasticly.