What do you think of this idea for a novel?

Well, I like the concept of a character going on the "path to recovery". Such stories are always interesting because you get to see a major psychological evolution in your MC. I thought it might be a little over the top? It might overweight the reader, and you'd be narrowing down the public to which this book would apply to by a lot. I'd read it though, and in the end it's not about what the world thinks, it's about what you think, and how you feel about writing your story. Good luck :)