It should be noted LEOs are presently under no obligation to enforce any laws, this is a well established principle of law. The police don't have to respond to your call or do anything when they observe a law being violated. So there is already substantial selectivity in what actually gets enforced and prosecuted.
So the question of an oath and titles is really one of what society wants to emphasize. I think we would be better off with a different oath and different titles, to emphasize that people working as peace officers are supposed to help maintain peace and order, not just blindly enforce the law.
Having too many laws, many of them vague and confusing, is exactly what gives rise to the negative sequelae mentioned (and are serious concerns), because LEOs can easily and perhaps even subconsciously have their own religious, racist or other personal views influence which laws get enforced and how vigorously or violently they are enforced.
