Why It’ll Be a While Before We Can Replace Car Mirrors With Cameras
...MPG requirements save fuel, which is a limited resource. Side mirrors save thousands of lives per year. Neither of these are frivolous regulations.

As far as the last question, I am a citizen. Thus it is my right to dictate, as a collective, what is best for us as a whole. That's kinda the whole idea of government beyond anarchy/despotism....you must have missed that in government class...