[dsfyu404ed]

>How can the NHTSA create a safety score regarding risk of injury, and then say that you can't use it to make a statement about the risk of injury?

Government is highly averse to saying or doing anything that could possibly come back to bite them (with exceptions beyond the scope of this comment) hence they will compile stats but are non-committal about drawing any conclusions from or interpreting those stats.

[rtkwe]

No it's not even that. The numbers they produce for front impact don't generalize across class and the real rule is basically the larger vehicle will have lower injury risk in mixed vehicle collisions.