So if it is not proved to be safer, then its not safer. Is that your train of thought?
Just by experience I find that drivers give me more room and appear to see me sooner if I wear high viz. I have no thesis to prove it. But I dont need one.
No Steve, that's an incorrect assumption of my train of thought. As I already stated, people dressing up as flashy lemons is fine by me, I'm all for personal freedoms, do what you want as long as it doesn't hurt anyone else*. As others have said, it has been proven that high-vis safety gear does not reduce the incidence of KSI figures in all sorts of settings, including cycling. Take from that what you will. Being visible is very different to being safe. I as others before me have pointed out that, a 'common sense' response of doing something (unproven) rather than doing nothing at all, can backfire spectacularly. If you willingly overstate the positive benefits (or fabricate them entirely), at the same time as disregarding the possible negative effects, you'll expose yourself to the phenomenon of unintended consequences.
For example, the brighter is better mantra, seems plausible right? Nope, the ensuing lighting arms race resulting in temporarily blinded motorists careering down the road at high speeds, clearly it will not be doing anyone any favours. Flashing lights? Eye-catching right? Being seen is important right? Actually, some studies have demonstrated blinky lights make judging speed and distance harder. Day-time running lights? Drivers de-sensitised the the presence of cyclists at night time. We can go on and on. The thing is. The actual downsides might be slight, but if the positives are overstated, then the negatives can more easily be overlooked, but what if the unintended consequences detract more than the actual equivalent of the overstated benefit? What if the culimation of all these safety tips, turns our roads into a modern day battle ground, where the simple act of cycling, is not longer safe or practical, and that put people off.
This plays out at a societal level, as well as the individual. What if to the layman, the high-vis clad road cyclists makes cycling feel more dangerous to them than that it actually is? What if that means less cycling overall and a public health crisis, what if number of cyclists on the roads fall, so local govt. can't/won't justify the funding to install actual meaningful safe infra? What if the victim isn't wearing high vis? Can the careless driver now get away with it because the victim didn't do everything in their power (wearing unproven safety gear) to protect themselves, despite the carelessness and mixing of modes which are separated by an order in magnitude in terms of mass being the root of the problem.
As others have said, I too hope that you won't experience a serious collision with a motorist, but if you do, you'll soon realise that being seen isn't the issue. It's being safe, and that means out of harm's way. I have lost count of the times I got SMIDSY's, despite it being a glorious clear day with a high sun. I wasn't invisible, I wasn't safe. I was at the mercy of my own reactions to incompetent driving. My clothing had no bearing on my safety. That's what the research tells us too.
*Actually, wearing high-vis, and advocating its use may actually harm the cycling safety agenda on a societal scale, as it distracts many from what can be done for very little money, if only there were the political will and less dead ends to lead well meaning blokes like you.