I will only say that's a blatant misrepresentation of the anti-compulsion side. I have fractured my skull, I do wear a helmet but I will challenge anyone who thinks that it's absolutely clear cut you should wear a helmet. It's far from so, nor do I see what expertise health professionals have which qualifies them to comment of the efficacy of cycle helmets, head injuries yes, helmets no.
Proof beyond doubt you say, a large pinch of salt I say. If we'd ever reached that point then these debates would be over.
Peds are often mentioned but it's a large pink herring because everyone forgets about centre of gravity which is far higher on a bike and makes risk comparison moot, as does potential speed.
I think most of the weary posts in these threads stem from those who've seen all this before and still await anything definitive on the subject.
If you asked me for my view, I'd say wear a helmet because on balance I feel it might do you some good and probably won't do you any harm but it could. I'd take a twisted neck over a fractured skull any day though, having done both, though only mildly twisted my neck muscles and not cycling. And if it was going to put someone off cycling, I'd say leave it, as the greater good of cycling outweighs the small risk of a serious head injury.
I think I've fulfilled my helmet quota for this year now, I'd rather talk about pelmets. Surely no-one has pelmets anymore? If they do does it make them more or less likely to ride a bike?