One of our readers (third letter) has an interesting (to say the least) view of traffic laws:
Any speed limit is a compromise between the appropriate speeds for good conditions and very bad conditions.
[. . .]
I would prefer that the police concentrate on obvious crimes, such as burglary, rather than strict enforcement of arbitrary regulations.
In other words, just go about your business and don't bother with me, police officers; I'll use my own good judgment to decide how fast I should go. But not everyone has good judgment, and police don't have the time or expertise to judge each case individually based on the driver's judgment and ambient conditions. That's why laws have to be artibrary.