If you are learning you should not be jumping. Yes, people make mistakes but handling a situation on a horse should be automatic before you take on anything such a jumping. An inexperienced rider is a bad rider. If they were experienced they would probably be a good rider. You can argue whatever you wish the fact of the matter is he didn't do what he should have known to you and he broke his neck. He was ahead of his experience and ability and paid a huge price.
Then there's learning to jump.
We understand. A more experienced rider might have stayed on. Roger. Wilco.