What's wrong with the sentence "the motive force of traditional agriculture is mainly manpower and animal power, and it depends entirely on experience"?

The word "complete" is too absolute. In ancient China, besides manpower and animal power, there were also production tools such as waterwheels and gondolas. This is not the power of people and animals! It's not entirely human-animal power, so it's mainly human-animal power. But production depends entirely on experience, which is problematic. There are many books on agricultural science and technology in ancient times, although they can provide some experience and technology, but the specific agricultural production must be adapted to local conditions, copying models and experiences without combining with reality, and agriculture can not achieve a good harvest. Therefore, the ancient agricultural production in China was the product of combining experience with actual situation, rather than relying entirely on experience.

The history of ancient and modern China and foreign countries tells us that it is impossible to make a concrete analysis of specific problems only by relying on experience and copying mechanically without combining with reality.