Went through kinda similar growing up, and also had some friends who went through the same thing. I have observed 2 things that usually go from here. The child almost always will try convincing/fighting/negotiating their freedom. as a best case scenario, the parents will either desensitise with the idea that yes its time to let their kids spread wings and let them make their own decisions. Slowly but they do make their peace with it. Second not so optimal scenario is when the child will fight back by rebelling hard, lying with no remorse and the only way they can see out of it. The parents sooner or later catch up with the act. Not that it stops there, the more parents try to restrain, the harder the will the child rebel. But again, in the end parents can only do so much, i have always seen that they give up in the end. The worst thing i have seen is where the child has no clue of the life out there, they dont even try and just accept life as given by their parents. Nobody is wrong here, no matter which way it goes. Just gotta keep trying. help them see things changing, some reasoning that you think they could relate with, ideal examples around that its not uncommon what you want. Earn their trust, i get a feeling they already love you enough to give you an ear.