A lot of people who live in bad parts of town do not have any kind of respect for education in general. For those types of people, knowledge is little more than an abstract concept which other people have, and that they have little to no use for. After all, if your highest career aspiration is to be an auto mechanic or to start your own landscaping business, what possible use could you have for history, literature, mathematics and the fine arts? Honestly, these people might not have very much use for such things.
However, for those who finish high school, there might be additional opportunities elsewhere for them. After all, you might find that you can do a whole lot more in life than just flex your muscles and move matter around. If that was all that you were good for, even a middle school education might be too much wasted schooling for you. However, you do have plenty of potential above and beyond just being a body that moves stuff around in this world. Your first step in realizing your ultimate potential is finishing your schooling, which has got to include finishing up (as in graduating) high school.
First off, there are almost no jobs out there which do not involve at least a high school education. It is a critical marking that you have done what needs to be done in order to be an adult person. People who have not graduated from high school are looked down upon in this society, partially because almost everybody else has if they are old enough to have gone in the first place. Without this level of education, your options are going to be limited.