I've foster parented queer youth. It was a wonderful experience. But what it taught me more than anything is that the system sucks and most kids do better w their families, even when the families are pretty bad.
Kids are dependent on their parents. Practically speaking, even if they're legally able to access care w/o permission, very few will be able to do so safely. It feels like a red herring to put a lot of effort into arguing for something unlikely to work for kids in their real lives.