Of course a job can be found, but what kind of job are we talking about? I'm all for 'doing what it takes' but when a certain peoples are relegated to work that disenables them to achieve 'a future' then I don't blame them for feeling/acting hopeless. I don't condone their actions (e.g. gangbanging or 'milking the system') but I can understand where they are coming from.
I grew up in a situation that could have led me down the road of hopelessness, but I steered away and have (and continue to) followed a path similar to the one you have proposed. However, I credit that to personal traits. I have not only grew up with individuals who have 'gone down the wrong path', but have continued to make a point of talking to young people who can be featured in 'Real Toronto II' to hear their side. You'd be surprised at the answers that I get when I ask them about thier future. While many have aspirations, you can see they sifle them with the realities they face.
Here's some sociolgy that may begin to explain:
http://en.wikipedia.org/wiki/Pierre..._.28Field.29_and_the_Subjective_.28Habitus.29