Because they are very minority sports. If the quantity does not go up, the quality is naturally difficult to guarantee. I don't know much about equestrian, but I can imagine how expensive it is to run a racecourse. The high cost naturally makes learning equestrian a luxury and niche thing. Archery is also a very small sport. Modern people's sports mostly aim at losing weight and shaping, but archery obviously does not belong to these two kinds. Learning archery is really boring. You need to keep an action or repeat an action until your muscles have a memory.

Nowadays, most people go archery to take a cool photo, send a circle of friends and wait for praise. The real archers are just a small group of people. Archery is a very quiet sport. It requires archers to have a calm heart, which makes many people flinch after experiencing it out of curiosity. In fact, some sports require some skills. Only by tolerating loneliness, putting aside utilitarianism and devoting oneself to sports itself can we do better, but obviously too few people can do it.

Although people in China started riding horses very early, horses are basically domestic horses. Domestic horses are short, not strong enough, not explosive enough, and most of them are tough and difficult to train. The advantage is that endurance is strong enough. All equestrian events in the Olympic Games only need horses to be strong enough and explosive enough, and there is no long-distance endurance race. There are many kinds of folk equestrian events, but they do not overlap with Olympic events. This led to the state that there were no horses and no people in China at the beginning of the Olympic Games. After all, it takes a lot of money to train this sport from scratch, including horse breeding and so on.

The only standard of modern archery competition is accuracy, which was not the case in ancient times. The bow must have a certain power, and it is meaningless to require the accuracy of archery under the compiled combat system. In addition, the most important point is that sports is also the embodiment of comprehensive national strength, so don't expect to shine in Mongolia. Modern archery is a modern sport. Undeniably, the Huns in the Middle Ages had an advantage in the war against western countries and even eastern countries. However, these histories are the past after all, and their cultural inheritance is meaningless to today's competitive sports. Besides, Mongolia's cultural heritage is really poor.