I take issue…

So my question is this. In The Da Vinci Code (which I love and have read 3 times) I find one glaring and rather insulting error. See, the book discusses the true nature of the Holy Grail and the fictitious group sworn to protect it, the Priory of Sion. As we read the book we find that the Sacred Feminine is a large part of what the Priory honors and protects. So my question is this, why is it that in the book the four Sénéchaux, including the Grand Master himself, are all men? Why are there no women privy to the great secret when the Priory claims to worship and protect the secrets of the true grail? Is Dan Brown implying that women can’t be trusted to keep a secret?

Just one of those random thoughts that woke me in the middle of the night…