Let me say it this way... If Egyptology is correct in their assumptions then 150 years without any progress in solving these mysteries is of no value to increasing tourism. If scientists could start turning up huge caches of gold in mere months then why keep the Egyptologists?
It's hard to understand the thinking behind this little bit of the status quo. If you want to know about something you call in a scientist. If it's for ancient Egypt then the scientist might often need to cosult with Egyptologists. Why put the cart before the horse? ;)
Egyptologists are very good at some things and back in Petrie's day they used to gather evidence. Those days are very long past. Now they tie the hands and muzzle the few scientists they allow in to work. They don't want any ancient secrets getting out especially if those ancient forgotten secrets throw cold water on their dreams of tombs dragged up ramps.