What the? I had no idea it was so colossal. I didn't even know UX "research" was a thing, as in, someone made their career out of it.
No wonder it takes 100 engineers to write a website, if it takes 100 researchers to dream up some coconuts for people lacking thumbs. Last I checked, humans haven't changed in centuries. The gestalt is all you need to "research" and understand the human perception, imho. Ok maybe in the field of VR, some research need to be made, but this seems like crazy amounts of people.