Um...yeah. I grew up poor. My dad was forced to quit HS to support his family. My mom had a teaching degree, but couldn't work due to mental illness. I got through college on grants, loans, scholarships, and hard work. I got an engineering degree because I was strong in math and science--it actually wasn't the best choice for me, I didn't care for it, but I was able to earn decent money while plotting my next move. I also married well, if by that you mean I married someone with a degree and a career (who's also a great guy). We put off having children until our student loans were paid off. Just about the only "advantage" that I can think that I had was that I was born in the US, where public education is available. Maybe you could consider it an advantage to have been poor enough to qualify for Pell grants (called BEOG and SEOG, if memory serves, when I got them).
There ARE options available to pretty much everyone. There are community colleges in almost every county in the US. There are trade schools--a large number at the HS level, so a person could get a jump on a good job at 18. A student could work and go to school part time, work and save money for tuition, live at home, live with a roommate or three, go the community college route, find a job with employer-reimbursed tuition. Some options might be more appropriate than others, but whether you start at home plate or on third base, you need to work with the circumstances you have.