"The Universities and public schools become insulated themselves so new voices outside of it are good and should be welcome. "
Well who are these new voices? I do not think that new voices are themselves good and welcome if the voice further confuses or misleads the field. Take for example Bill O’Reilly’s new book on Lincoln, a best seller on Amazon and yet the book, which is historical in nature, does not cite any primary sources meaning that it is a book composed of nothing from the time period it is documenting. Now historians would call this a “synthesis work” which is ok…if you have been a historian for decades. Bill O’Reilly and his co-author (to my knowledge) are not historians. They have no historgraphical knowledge of the subject and they do not even bring forth text from the period to colobarate their thesis. That to me is an unwelcome source.
“You can’t just say oh well this person doesn’t have a university education therefore their ideas are to be disregarded entirely”
No but I would say “this person does not have an education on this matter so their ideas should be disregarded.” Again, example: Centinel talks about an ancient society he has no idea about.