You'll find that many do, when I used to cycle everyday, I was insured up to the hilt, for personal injury and any accident I may cause, but just like the fuckwits who drive cars like idiots, you get fuckwits on bikes who haven't a fucking clue, just like you get fuckits on mopeds and motorbikes delivering pizza screaming round like idiots with a death wish wearing L plates.
The roads are to be shared by all, but those in the biggest cars, vans trucks seem to think they are somehow entitled to a priority service at times, we've all seen massive trucks on the motorway change lanes without indicating, just as we've seen the 4x4 brigade throw their weight around with smaller cars, and we've all witness's cars getting irate with cyclists because they dared cycle on the same road, and slowed them down for a few seconds.
When I'm on my bike I've stopped numerous inexperienced cyclists and given them "some advice" on their road use, some either don't realise how much danger they're actually in, ( no helmet, headphones on, weaving and no-handed in the middle of the road) or don't give a shit, some have had no lights on at night, wearing all black and almost hit me doing serious speed, when I offered this cyclist some timely advice he chased me for a mile, and was quite upset that I had the audacity to call him a fucking idiot, when I hilighted the fact that he as a danger not only to me and other road users, but he was likely to get killed, it didn't matter!
There should be a basic training programme cyclists must complete when purchasing a bike, and any cyclist seen being a danger to themselves or others should be forced to attend a cyclist awareness programme, much like errant motorists have to, or have their bike confiscated.