Parveen certainly has earned having a voice on the subject. He does a good job of making presentations. The data provided by those scans is showing something, but interpretation (shapes, form, dimensions) is more vague than ultra-sound images.
That said, the theory that there are large underground structures should not be dismissed. Nikola Tesla’s statement about his tower ‘grabbing on to the earth’ (his tower had deep drilled holes/conductors) comes to mind. Consider the idea of an antenna. The larger the antenna, the more powerful ‘signal’ it collects (think aluminum foil added to rabbit-ear antennas). A large earth-connected set of structures would allow harvesting much more energy to be projected by the Giza Death Star apparatus. Much more than just a pile of rocks sitting on the surface.