Ambition can indeed help lift a family out of poverty. But the saying « she can’t be it if she can’t see it » applies to all really.
If you don’t see role models, from wherever you find them, it’s hard to see that work and education lead anywhere. It applies a lot to girls but equally to many kids and adults who aren’t coached to see and grasp opportunities and invest in themselves for a few years,
Many families don’t see the benefit from extended education. Their doctors teachers etc are all from a different area and a different economic class.
I don’t know if the change in law in the Uk regarding education until 18 has had any impact. A few families I know were furious about it as their 16 year olds were now expected to be apprentices, with time off to study and attend courses, rather than just getting jobs. And these were not all families where they needed 16 year olds to be contributing to the household. The era when you started as a shop assistant and progressed to manager are gone, and it was never guaranteed, the graduates are joining further up the chain and progressing faster.
Enabling families to keep kids in school etc is key IMO.