I am both a cyclist and a motorist, cycling every day into work.
I am faced with the option of cycling down the city centre quays on the footpath, or running the gauntlet with cars, buses, trucks and motorbikes. I will always choose the path when I can, but I'll slow down if there are pedestrians coming towards me. Its much safer for me, as I've had too many cars making a left turn on top of me, doors opened in front of me, cars with no brake lights stopping suddenly etc. I'll always use lights on the bike from dusk onwards too, simply because I know from driving myself how invisible a cyclist is at night. Where possible, I will also jump the lights if there's no traffic coming, simply to be away from the traffic as the queued up cars pull away when the lights go green. Again, its primarily because its safer for me...
Its a pity as 99% of motorists are courteous, leave a bit of room, and keep an eye out for bikes on the inside, but its the 1% that you have to watch out for...
The reality is that it is just not safe to have motorised traffic sharing lanes with cyclists. A minor motor accident (i.e. a fender bender) is much more serious for a cyclist if they are involved.
It still shocks me too see cyclists tearing down the footpath with plenty of pedestrians, kids etc. around. Bikes without brakes (!), without lights, and the old cycle-courier favourite, run through the lights when people have the green man to cross ...
Even though the Dutch example is great, where bikes have right of way in the bike lanes, there are still a shocking number of cyclists killed by trams in Amsterdam ...