Most drivers also fail to appreciate that bicycle can stop in a shorter distance than cars can, a bike and rider are lighter then a car and driver, so the braking distance is shorter (the thinking distance is the same).
Sorry this is completely the other way round - the (safe) stopping distance on a bike is much further than a car, especially from 30mph.
A car has 4 wheels each with their own brake discs, a much bigger contact patch with the ground and inherent stability as well as things like ABS. Stopping on a bike you are limited firstly by the smaller brake pads and contact patch with ground, and secondly by the amount of braking force you can apply to each wheel - there is only so much braking force you can apply before you either lock the back wheel or do an endo and that limits how fast you can stop.