It's up to the courage of the filmmakers to make art in cinema not just business. John was rejected by studios he borrowed money and did movies with his own money. You're either courageous or not. You have to find a way.
Perhaps it sounds ridiculous but the best thing that young filmmakers should do is to get hold of a camera and some film and make a movie of any kind at all.
My favorite laser disk ever was the laser disk for The Graduate which had a commentary track that wasn't even the filmmakers it was a professor some film criticism guy who just happen to be this amazing commentator who went off into the whole theory of comedy.