> By speed alone, bikes are to pedestrians what cars are to bikes. A pedestrian will walk at 3-5km/h. A bike will be 5-7 times faster than that at 15-35km/h (especially since the advent of e-bikes which ignore assist requirements). Cars will be 1.5-4 times faster at 40-50km/h.
When it comes to collision you should remember the formula "half m v squared". A cyclist with his bike is usually less than 100kg which yields on impact. A collision with a pedestrian can be as bad for the cyclist as it is for pedestrian.
A car will be at least 20 times heavier and twice as fast as the cyclist and will not yield on impact. The bonnet and windscreen maybe, but not the chassis after the bumper yields.
> Where I live I feel less safe as a pedestrian sharing the sidewalk with a bike lane than I feel on the bike sharing the street with cars (except car doors randomly opened in my path, that's what terrifies me). Not a day passes without a cyclist almost running me over when I cross on a green light, or because they try to squeeze around on the sidewalk at unsafely high speeds.
Statistically you are in far more danger of getting killed by a motor vehicle on the sidewalk or an intersection than you are by a cyclist riding the sidewalk or jumping a red light. A cyclist will usually inflict a painful bruise on collision. Even needing to be hospitalized is unlikely.
Despite the blatant and often overlooked red light jumping by cyclists on busy city streets, how many fatalities occur from that behaviour, compared with those from motor vehicles?
Another thing to be said. The danger from the cyclist stems primarily from the cyclists riding manners, and has more to do with the social and cultural attitudes. The danger of the motor vehicle comes from the nature of the motor vehicle itself, its mass, steel reinforcement and speed which is compounded by the attitudes of drivers.
The average speed of a cyclist on urban streets is roughly that of a top level marathon runner if not less, and how scared are you by the danger a marathon runner with a metal bar held in front of them poses in a collision?
> Can't tell you how many times I was asked why am I bothering with the helmet,
On the matter of cyclists wearing helmets, how different is a cyclist riding on a narrow road without a sidewalk differ from pedestrian walking the same road? Does the absence of a safe sidewalk to use mean the pedestrian should wear a helmet in case they collide with a car?
Helmets worn by cyclists are no different from those worn by horse-riders or in other high impact sports. They serve to protect the helmets from impacts incurred on their own account, not from collisions with motor vehicles, although they do help in the latter.