More aggressive policing does not imply more solved crimes. It does not imply that actual worst wrongdoers get caught with some kind of effectivity.

However, it implies antagonized population where even innocent people will avoid police contact, whether reporting of crime, informing to police or otherwise cooperating with them as much as possible. It implies that people dont see police as an institution to protect them and dont use them as such.

More aggressive may mean quotas for arrests - leading to arrests that have nothing to do with public safety. It is easier to arrest someone apparently poor for loitering or sorta kinda open bottle of alcohol then someone actually violent.

Same with fines. For example, if the masks are mandatory outside, cops can either issue warning or give you a find. In most cases, warning is enough to make people comply and take it seriously. Fine is used only when people refuse to comply. If cops were aggressive and issued fine immediately to everyone who had half nose out of mask, we would not be safer.

More aggressive means exactly that and nothing more.