Zahi Hawas has quite the reputation of being a phony. Many lay blame directly at him for refusing to allow the exploration and analysis of some ancient sites and artifacts that would run counter to the narrative he supports. An example is that a civilization that existed before the Egyptians is responsible for things like the Sphinx and Great Pyramids. He also refuses access to certain areas of these sites to prevent further exploration from what I understand. I know many folks can't stand him and say he is full of shit.
I don't know enough about the subject to have a strong opinion but would like to understand what is gained from not allowing more exploration of the tunnels and rooms under the Sphinx, etc.