Large Criminal Justice systems like NYC have a large population and it's easy to end up being thrown in a cell and forgotten. Having a lawyer or not is the biggest difference in outcomes. I sat in on a lot of court cases in Philly when dealing with a case. Saw 17 year olds locked up with no lawyer over a simple drug case while a guy caught dealing pounds hired a lawyer and got off with nothing after completing a "rehab" program. Guy didn't even use.