That's a red flag for me. Your heart is in the right place, but at the same time: You can't force anyone to change. They have to do what's right for them. This is a hard field; it's very very hard actually. If she doesn't have enough passion to even stick with a course more than a couple days, then I doubt she'll be able to stick with it long enough to become employable.
Yes, it'd be great if this was a backup plan that fit her interests, but it doesn't seem to be that way. Life's too short to work jobs you hate, I'd recommend that she continue pursuing her passion, and continue exploring other backup options. Are there junior colleges / trade schools in her area? There are many in-demand fields, I'd recommend that she gets into a program (like at a junior college) where she can bounce around, take different types of classes, and figure out where her interests lie. Who knows, maybe she'll find out that she loves real estate, or welding, or cooking, or nutrition. She's still young, she has time to find those answers.