The wall is usually 14-ish with limitations on what you can do and how many hours you can work.
We have to limit it otherwise adults will take advantage of the fact that children don’t know what they’re doing.
Yes, some of them might be smart enough, but a lot of them aren’t, and it’s better to protect the majority and work on irregular cases on their own merits.
Part of becoming an emancipated minor is showing that you have the means to care for yourself to a judge, otherwise you’re not allowed to become emancipated