Not sure you quoted me to agree or disagree with me, but basically i was saying the same thing. DOT and Snell standard is a minimum that every helmet needs to meet, but extra protection is something else. Just like u said, passing rate is 50, and a lower range one could score 51 and a higher range one could score 95. But i did acknowledge that quality, including safety scores, and price are not necessarily perfectly correlated. Now one can argue that my shoei could score 51 and a no name could score 95. I agree. However, first of all if a no name scores 95, then the manufacturer must have used either very good material or advanced technology, either way the price would probably not be cheap at all. Second of all, as an average consumer, you may not have the resource to the testing data. In my case, i'd pay more and prefer my shoei over a no name just for the peace of mind. In this particular case, both bell and arai are good brands, but as a consumer, i'd personally FEEL safer with a $500 arai or bell over a $100 bell. Its just my preference as an average consumer without studying their actual safety scores of DOT and Snell tests. If you feel the other way around then it's your preference.
Also, i agree with you that branding is a big factor, and my statement was, i dont believe that the price difference is SOLELY due to design (prints and looks, not functionality) and branding. One can argue that Functionality design contributes to safety too. Durability is part of safety too, i'd say. Average life of a helmet is 3-5 years. When you are approaching the 5th year or pushing it to the 6th year, would the more durable/higher quality one be safer and leas likely to crack? Again i'm not a scientist and haven't read any detailed consumer report or testing data, i may not as smart but i'd bet on the higher range ones if i have to.