So we're dealing with a passive revisionist agenda? I think you're on to something.
Food for thought: June claims to be a shark expert without any real credentials. Is this a result of cavalier arrogance and disdain for science (and hence, history/evolution)? If so, perhaps this is her view towards pre 1980's film as well - ignore it and it doesn't exist.
Scouring the dark web for documents of their purported 'talkie burnings' at bohemian grove circa 1994.