This is totally true, and I agree; I tried to guard against this at the end with the "I think this is enough to state a hypothesis, which would then need to be

This is totally true, and I agree; I tried to guard against this at the end with the "I think this is enough to state a hypothesis, which would then need to be tested.." paragraph. However - the same is true for 2009, 2010, 2011, 2012 model XC90s, and they are just one of 10 models that had no fatalities in those four model years in the study. I just picked that year and model to get one data point for mileage to compare; the other model years of XC90 have similar sales, so the same applies. So, while you're right, I don't think it's an entirely useless comparison; it indicates there could be something here, which could then be used to state a falsifiable hypothesis, something like: "Similar cohort drivers would be safer in <one of these ten models> than in a Tesla.".