Other potential models, beautiful and enthusiastic, can find no way to start.
Models fail for many reasons.
The biggest of all, the lack of competent, legitimate advice and information. Everyone around you, everyone you run into has advice for you. Those of you who have followed some of this advice know well that it does not work. When you haven't done so well, the simpliest and easiest thing to do is to blame your agent or someone else. After a while, that doesn't work either.