There are many factors as to why people are interested in inspiration movies. One factor could be because they could relate to the movie. Inspirational movies, videos, stories, etc. are often true to life stories. So the viewers can connect with the story emotionally. Now to answer, "Is it all about the money?" Sometimes, yes. But these inspirational videos and movies do sometimes serve an awareness. For example, if an inspirational video had a main character who was ill, it would make the viewers more aware and knowledgeable about the illness and its effects on the patient. These are my thoughts on inspirational stories and movies.
I hope I helped, good luck!