Why is biking on the road so dangerous? Or do I just have bad luck?

I have been hit twice riding my bike to school in the past month. The first destroyed the back wheel on my bike and the driver sped off. The second one happened today while I was crossing a street IN a crosswalk. I am very lucky in the fact that I have been uninjured in both accidents. Has the dmv started issuing crack to California drivers or something?