Read the following text excerpt and answer the question.

"The concept of 'smart policing' has gained traction in recent years, particularly in urban centers where data-driven strategies are employed to allocate resources more efficiently. However, critics argue that an over-reliance on predictive algorithms may reinforce existing biases within the criminal justice system, leading to disproportionate surveillance of marginalized communities. Proponents counter that when implemented with transparency and community oversight, such technologies can enhance public safety without compromising civil liberties."

Based on the text, what is the main point of contention regarding smart policing?