Let me start by making a statement, take it how you will, but it is not an attack. You need to learn to argue the points people are making, not what you think you are hearing. NOBODY said a rule change would have prevented what happened. NOBODY said they are opposed to helmet companies making helmets safer. Straw man arguments just lead to people not taking you seriously.
What WAS said: There are multiple ways to address most problems. The difference between no helmets and today's helmets is huge, but we are close to the point of diminishing returns. Concussion research evolves but they still don't know everything. Helmets have probably hit the point where they have done all they can to help mitigate, which is not much since many (most? don't have data) concussions aren't from direct impact.
What WAS said: Someone who works in a field that uses data and probability feels that rule changes would have a bigger IMPACT (he didn't say it would have prevented it as you accused him of) on many high-risk scenarios.
Argue your points as vigorously as you want, but argue against what people are actually saying.