It's the parent's prerogative to send their children wherever they see fit. It's also the parent's prerogative to prepare their children the best they can for "real life". Some parents are well equipped to actually fully participate in their children's environment, try to make it better, implicate themselves, do activities, vote, give time, money, opportunities and trying to make the school a genuine good place for their children to be.
Not everyone is able to do that. My parents were able to do that. They were able to actually send me to alternative (and public) school, to participate fully in the school's life, always be there for me. It was a hard choice for them, not only needing to drive me an hour every day, then go to work, but also participate many nights and even some days to school life. Even for them, they eventually gave up one such school, and went to another one because it was plainly too demanding. So I wouldn't expect everyone to give the dedication to bring their prized school up to par to their expectations. Some parents are just able to pay up, are not able to speak or talk adequately, or they don't have time to dedicate themselves to such hard work, and we have to respect that. Alas, today in this world where parents are paying premium and expecting their young bastard children (exaggeration intended here) to do well, and screaming to the teacher (instead of screaming at your own children) whenever they don't have straight As is the norm, I expect the school system to remain crooked.
In the end, people are voting with their attendance. If your school system is bad enough to fear for lives just by attending, I'd expect people to try to move away from these places. There's preparing for real life and there's plain madness... and I'm truly sorry for the dedicated teachers giving their lives and soul for these schools; my mom is such a teacher (nearing her last working years now), giving her life to people with learning disabilities (or missed opportunities); her and many fellow teachers are giving what they can, but sometimes, it's not enough to convince parents.
On my side, I actually moved to a place where active outdoor life is adequate, near good quality schools (not the best - but in the >75%), and I plan my children to have a good chance in life, using neighbourhood friends, public school system, dedication, caring and be with my (future) children for anything they might need. That's where I decided to give my money, that's where my vote is going, even if I have to take the train and public transportation 3hr every single work day.