"Unfortunately they never kill each other, it is usually some poor sod caught in the mayhem they create."
This is the thing. A driver and a cyclist come together, regardless, it is always the cyclist who gets injured/killed.
Therefore when driving a vehicle, you have to be damn well properly in control of that vehicle because the lack of concentration or good driving can literally kill.
Ultimately, we are all trying to get somewhere, and regardless of who we are and what we are on/in or even walking, is being courteous and careful to each other too much to ask?