I guy I know from the club came off Saturday night, I don't know the circumstances. He's had an operation for "quite severe facial injuries" again don't know the details. He wears a helmet but whether it did any good or not I have no idea.
Whether you view cycling as dangerous or not probably is determined by the riding you do and the people you know and the experiences they have and what they all talk about.
In the last couple of years I know of at least 7 riders coming off out of the small group I'm associated with. Pretty much every accident not involving any other vehicle.
So riding at speed and in close proximity to others is dangerous, which is why I view cycling as dangerous I guess.
And this is all the more reason why there should be publicly evidence as to what a cycling helmet can reasonably be expected to do.
It is pointless asking people to perform the risk assessments that we all do, day in day out, without any kind of information. For example, today is quite cold. There may be ice about. That increases my chances of coming off the bike (I've never come off on ice yet but recognise the increase in risk it brings) but I have absolutely no idea whether or not a cycling helmet would help. Because no manufacturer has advertised their product as being tested against this kind of thing, I have to follow the idea that no advertising means no the helmet won't help otherwise a manufacturer would be all over the market to gain an advantage.
Close riding is another aspect that raises risk. I could say that close riding in proximity to others who are not particularly good at close riding but then you could look at the pro peloton to see experienced pro riders coming off. However, again there is no evidence as to how a helmet changes or mitigates the risk involved. In fact, if you look at the peloton, it's rarely head/helmet damage that is sustained. It tends to be road rash on hips or broken collar bones at the more serious end.
This is what I've been pushing all through this debate. The more anecdotal evidence of "my friend crashed but he was wearing a helmet so didn't die" is pushed forward the more people will feel that a. cycling is dangerous and b. that a cycling helmet will mitigate that "because everyone wears one innit". The more people wear, and more importantly buy, helmets without fully understanding what they are tested against, the lower the inclination of manufacturers to bother putting in the time testing and evidencing the efficacy. After all, why bother if people are going to buy them anyway? It follows therefore that if people want a helmet to be truly helpful in various real world scenarios, the easiest and fastest way to make that happen is to stop buying the plastic hats currently being peddled by manufacturers and instead to start asking those same manufacturers "Just what is this protecting me against and can you prove it?"