It is being used as proof that they leaked it from a lab, when it is just how societies built like China behave. You can't infer anything from normal behavior.

It is similar to the way that Hussein's actions in blocking access to presidential palaces was considered to be highly suspicious and therefore proof that he was hiding his weapons program. Turns out he was just trying to save face domestically by standing up against the weapons inspectors over something that he considered symbolic and immaterial in order to not look like a total pushover (a desperate need of dictators). It had nothing to do with weapons programs at all.