Gravity is a very complex phenomenon, and it is not fully understood by scientists. While we can describe its effects very accurately, we do not know exactly what causes it.

One of the reasons why gravity is so difficult to understand is that it is not a force in the traditional sense. Forces are interactions between two objects, but gravity seems to be a property of space itself. This makes it difficult to visualize and to model mathematically.

Another reason why gravity is so difficult to understand is that it is very weak. The gravitational force between two objects is proportional to their mass, but it is still very weak compared to the other forces of nature. This makes it difficult to measure and to study.

Finally, gravity is very different from the other forces of nature. The electromagnetic force, for example, is mediated by particles called photons. But gravity does not seem to be mediated by any particles. This makes it difficult to understand how gravity works at the quantum level.

Despite the challenges, scientists are making progress in understanding gravity. In recent years, there has been a lot of research into quantum gravity, which is an attempt to unify gravity with the other forces of nature. While there is still a lot of work to be done, scientists are hopeful that they will eventually be able to understand gravity in a way that is both simple and accurate.

As for the statement that nature is simple and we should stop trying to make it complicated, I would argue that nature is actually very complex. We have only scratched the surface of its complexity, and there is still a lot that we do not understand. Trying to understand nature is a noble pursuit, and it is one that has led to many important discoveries. We should not be afraid of complexity, but instead embrace it as an opportunity to learn and grow