If all these non-hi-viz wearing cyclists are so hard to see. Why are there so many of them? How do they get to work safely?
I knew a guy who used his hand-held mobile all the time while driving. His view was that if it really was dangerous, he'd have crashed.
I still know a man who drives regularly between pub and home in mid-Wales while significantly over the drink-drive limit. He takes the same view.
I used to drive at quoite outrageous speeds throughout Europe and never hit anyone. I took the same view.
I am not Johhny Day-Glo and do not swathe myself in Hi-Viz before riding, but I do like to wear bright colours and (now I've reached something like middle age) I do like to give other road users a little help in distinguishing between me, hedges, shadows and buildings.
As a (now more gentle with the throttle) driver, I do appreciate it when other road users make a reasonable effort to be visible.
There may well be brain-at-home, boy-racer, penis-size-issues, throttle-happy morons out there on the roads. We've all come into contact with them in one sense or another... They may carve you off the road whatever you wear.
But making a reasonable effort to be seen helps ALL other road users, most of whom are skilled, compassionate, home-loving, apple-pie-eating, thoughtful. speed-limit-respecting people.