If the jockey is not to blame then who is? The horse? Then he(the horse) should be disqualified and the jockey be given no penalty.If we accept that neither the horse nor the jockey is to blame then we don’t need stewards or rules.I believe that there is always someone responsible (known as blame)when they are on the track.
Sometimes no one is to blame. Sometimes people or the horse are to blame and then we need stewards. We don’t know when it’s going to be the former or the latter so stewards are there for the duration. It’s quite bloody simple unless you thrive on childish extremes.