Of course not all of them, motor users do much more stupid things on roads, but a) they need to pass an exam and actually know the traffic laws; b) they can loose a driving license and pay high fines; c) they pay insurence and d) even when in accident, the chance of major injuries is radically lower than when riding a bike. Cyclists, on the other hand, don't give a shit and ride however they want. If we allow cyclist on roads, why not allow skateboarders or rollerbladers - what's the difference?
The difference is that when you're behind the wheel of a car your in charge of a machine that can very easily kill other people.
> the chance of major injuries is radically lower than when riding a bike.
The chance of causing major injuries is radically higher. You're confusing that with the chance of the driver themselves be the subject of the injuries.
Of course there's a higher degree of accountability for drivers, as there should be.
I think your understood me wrong - if you hit a car with a car in city, there's a small chance anyone will get seriously hurt, but if you hit a bike with a car, you can kill someone and it doesn't matter if it's your fault or not, it sucks anyway and you can get into serious trouble. So even thought motor users do more stupid shit, the chance someone will get hurt is much smaller, therefore cyclists should be much more careful when driving on roads, but from my experience it's the exact opposite, and it's scary.