Admittedly that was over ten years ago, and that particular council has made a fair shake at having more council housing than anywhere else. (Some families have apparently specialised in getting little empires of them, to sub-let)
Maybe it’s LA dependent then, as my experience was the same as a teacher in a particularly deprived northern town. Girls who wanted to get away from their home lives the only real option was pregnancy and setting up on their own. Quite a few would time their pregnancy for their 16th birthday. It was often used as a way of getting out from an abusive family.
One family no one had worked for generations, except for one woman who worked in the local benefits office. Knew all the ins and outs, how to fill out forms, which benefits they were eligible for etc.
It was very sad in many ways that to many youngsters there were no other opportunities.