When enforcing the law, no two situations are ever the same, there for becoming difficult and impossible, in some cases, to enforce the law equally. There are different circumstances in every crime, take murder for example. A ruthless, sadistic murder that was intentional. A pregnant woman being beaten by her husband until she, out of desperation, grabs a knife and stabs him to death. Two very different circumstances but they both fall under the same crime, murder.
The types of situations that police officers should be allowed to not enforce the law/ use their own discretion is when it comes to petty crimes such as children writing on walls, jaywalking, or having a headlight out. You can’t possibly write