A point of view I can imagine on these infractions is this: it is necessary that there be a clear line between what is legal and what is not, and that all the law be enforced. Failing either of those, officers have the opportunity to selectively enforce the law in a way that is biased, brings them profit, or intimidates people for reasons outside the law. For that reason, every infraction, no matter how minor, must be enforced, and if it's unfair, law will have to change to exclude those edge cases. Otherwise you have unjust chaos.

I'm not sure I agree with that, but I think it's not irrational.