I'm curious why you think a helmet wouldn't do much in a car crash, seeing as in any car race every driver is wearing a helmet.
Also, race cars aren't really comparable to normal driving situations since they go much faster and have a different set of constraints than normal cars. The racing helmets, rollcages, and 5 point harnesses aren't really as necessary at 70mph as they are at 200mph
https://www.treehugger.com/cars/why-all-cars-should-be-hi-vi...
https://www.cdc.gov/traumaticbraininjury/get_the_facts.html
The data disagree with you.
So no, based off of your links I wouldn't say the data disagrees with me.