The first difficulty lies in the financial side of the question. Ammunition for horses and outfit of the rider is quite a lot of money, to say nothing about the content of the animal.
The second difficulty lies in the proper education of the horse. The training should take place in the presence of an experienced horse-holder. Under the assumption of small errors in the education of sport horses they become very difficult to repair and sometimes do not resolve at all.
But the main difficulty is the danger. The horse is a pretty unpredictable animal. Like all herbivores, in the event of danger, it is ready to run in any direction, just to escape. The danger, in her opinion, can come from anything. Let it be some random thing that this animal is never seen. The rider may not notice such a thing, and the horse will find it in the first place, the fear can occur unexpectedly, causing the rider is likely to be on the ground. Despite the seeming danger, the horse can incur, and to stop it and will not. Stop will occur only when the horse will realize that it is not in danger. To sit on fragile and very rapidly galloping animal is quite difficult and even experienced riders often find themselves at the bottom.
The horse is a very large animal. Equestrian sport includes different types where there are different obstacles to overcome sports couple. In this case, it is possible the fall of the horse, with which can cause injury to the animal and its weight, the horse may push the rider. Mismatched and outdated ammunition can hurt like an animal, and man. In the fall of his rider's feet get entangled in the stirrups, which leads to injury of the limbs of the rider. When properly worn the saddle or the bridle a bad horse can get a variety of scrapes and injury respectively.
Despite the brilliance, expressiveness and passion of the equestrian sport, we must always remember first and foremost about safety, not only while in the saddle, but next to the horse. Neglecting all or some of the rules can lead to irreparable consequences.