Why would it be or should it be? There were no books in my Catholic school history classes about George Washington being a space alien either.
These documents and ideas obviously were and are being suppressed from most people.
It's only obvious to your ahistorical mind.
There are thousands of volumes beloved by orthodox Church fathers that have not survived either.
Of course, I don't view it heretical at all that Jesus was from the one true God.
You don't have any authority to opine on the orthodoxy of anything.
I guess that is why these things have been suppressed all these centuries.
They weren't suppressed. If they were, we wouldn't be reading them now.
The rarity of Gnostic texts today has to do with the secrecy and the elitism of Gnostics and nothing to do with the Christians who laughed at their foolishness.
The religious leaders had no fear of them.
The Gnostics were the Scientologists of their day - do you think that the Pope, the Ecumenical Patriarch, the President of the Southern Baptist Conference or the Archbishop of Canterbury are worried that L. Ron Hubbard is gaining on Jesus?
What proof do you have that hundreds of millions of religious people have ever been exposed to these alternate views?
"There are thousands of volumes beloved by orthodox Church fathers that have not survived either."
Must not have been too important then.
"You don't have any authority to opine on the orthodoxy of anything."
I can opine on anything I wish. I don't recognize the authority of anyone to tell on what I can or cannot opine.
"They weren't suppressed. If they were, we wouldn't be reading them now."
No, we are reading them now because of the internet and the reach it has. If we relied upon religious authorities, we would never know of these documents.
"do you think that the Pope, the Ecumenical Patriarch, the President of the Southern Baptist Conference or the Archbishop of Canterbury are worried that L. Ron Hubbard is gaining on Jesus?"
I don't worry, nor do I care. But this isn't an important an issue for me as it is for the people you mention. And I do think they are worried somewhat, otherwise they, and you, wouldn't devote so much time to it.
"Why would it be or should it be?"
Because then, and now, religious leaders fear that their "flocks" will read these books and documents, and ask them some hard questions. And to my knowledge, hardly anyone has ever feared that people might have differing views and opinions about George Washington.