The enforcement objectives are like a horseshoe.
The police have an incentive to get collars for petty possession, mostly to bank warrants for future trouble, and to go after big or brazen networks.
The people in the middle are mostly free of interference. I used to work in a building that was about a block away from the county court, 4 blocks from a police precinct hq. Yet I watched three guys sell drugs across the street for the two years that I worked there.
It has its ups and downs. In my state, with bail reform, woke stuff, and marijuana possession decriminalization, there has been a wave of shootings and murders as the gangs reorg and the cops are caught with their pants down.