At last a sensible & informed post.
So the most likely reasons women get a higher percentage of more injuries & fatalities in road accidents is most likely due to women driving lighter & smaller cars in general and hence not having a much protection from impact in collisions and the fact that men are more physically robust than women in general.
In all likelihood, the crash test dummy thing is pretty bogus, since regulations have for some time now included the 5 percentile small female as part of the regulations.
The last thing to consider for objectivity here (I realise that this is a lot to ask for for some here), is that when car crash dummies were introduced initially men did most of the driving & miles on the road, therefore it probably made more sense to base the crash dummy on the most likely driver to be involved in an accident I.e. approx the average male, and then design safety around that. I mean they also didn't make 6'6" 230lb crash dummies for extra large men, cos they simply understood they weren't as likely to be driving as the average driver....
Even today, I'd guess men still drive far more miles per annum driving than women on average (easily ratified by insurance data on driving, where we self report our approximate annual mileages imho), as there tends to be more men who drive taxis, delivery trucks, etc, etc as well as in most couples the man does more longer driving more often IME.
And lastly, the answer to the 'question ' was in the question, there are still more males killed & injured on our roads than women, and by some margin, so have any of ye possibly considered that the crash dummy being 5'9" & 75kg could be fairly irrelevant in the grand scheme of things!?
Just a thought.....