You are missing the point entirely
The Monterey has extremely large OOIP in the form of Kerogen. That cannot be said for recoverable reserves however
Most geologists agree that it is mostly outside the hydrocarbon maturity window. It is simply not cooked enough
The maturity window is a big thing.
For all the hoorah for the Eagleford, 90% of it exists outside the ideal maturity window
That petroleum is not the topic of discussion of this article. It is only referencing the oil that has already been "cooked" out. What you are describing applies to the Bakken as well. That may be future production but it isn't the real concern of today.