>unfortunately there are some very closed minded people within Egyptology

This is indeed a true fact, but the reason for this lays in the history of Egyptology itself. It is (with other scientific subject) a very young and need to find a place in the academic world after the first "gold rush" when the excavators from all over the world rest without any documentation or publication. A lot of rumors and half-knowledge was used to build up secret societies. So, to keep the balance. It was a lot of Egyptologist. This led to an Egyptology that might be perceived as "stubborn".

>this is holding us back from a true understanding of these wonderful artefacts

No, not really. As far as I can see, Egyptology is in a transformational process. Especially young Egyptologists are more open minded than most of the people would imagine. The problem is just the academic boundaries in general (also in other subjects and research fields). No one is really "free" to publish crazy hypotheses without weighing the risks of being dismissed by collegues. 
But more courageous people are coming up, believe me...