It is a bit easier being homeless when you are an adult. Being a child and being homeless can be horrible. You might be afraid that some gang would come and take your clothes, and burn your shelter. Not knowing if you are going to be alive tomorrow. They are simply afraid.
Nobody really knows.
Maybe they feel that they are not welcome at home, or maybe they are afraid. Just imagine that you are cold and that you have nowhere to go. You are hungry. It is just not fair that we let people starve. If I were homeless, I probably wouldn't want fame and money.