I grew up inthe 60's and 70's near two sand and gravel operations, one of which is still active today. I have also performed permitting work in the Pinelands jurisdictional area for a now-idle sand operation in Atlantic County.
Until we can figure out how to live without concrete, asphalt, optical fibers for communications, glass, abrasives and a staggering multitude of other products, silica is an absolute necessity for our way of life.
Like it or not.
Resource extraction is acknowledged as a native component of the Pinelands cultural systems and they actually address it very sensibly in the Comprehensive Management Plan. The permitting activity that I was involved in was actually much simpler than dealing with a normal residential or commercial development application.
The article you presented certainly throws shadows on the zoning changes that were needed to make this particular operation a go. I don't have an opinion on the how that came to be without knowing a lot more about the case.
I will say this....You can't raise a glass to the Pine Barrens without the glass !