Of course, there are other reasons besides this. In my opinion, it was mainly because China's technology was not very developed at that time, and rushing into it might destroy many cultural relics. After all, these cultural relics have been buried underground for a long time. If you open it rashly, it is very likely that these cultural relics will really disappear. If China's technology advances, the safety of these cultural relics can be guaranteed, and these secrets will eventually be revealed to the world.
At the same time, there is another reason, that is, it is said that there are many organs in the tomb. If you rush in, it is very likely that the players who enter will have casualties. This is something that no country wants to see, let alone our people-oriented country. We will never act rashly until we know that there is danger. Only by minimizing risks can we explore further.
In fact, in my opinion, if the imperial tomb has a sense of exploration, it is imperative. After all, human development is inseparable from these explorations, but if it is of little significance to enter them, there is no need to explore them. First, it may cause a lot of waste of manpower and material resources. Second, anyone who sleeps underground believes that he doesn't want others to dig his grave.