And for good reason. Who would ever be a cooperative or truthful witness if his testimony weren't guaranteed to remain confidential?
Not just that, but the people being charged in the Grand Jury aren't there, and neither are their lawyers. Nothing presented can be contested, like a "dossier" that was paid for by the Hillary campaign and the DNC, so nobody can challenge the validity of any of the so-called evidence, or the charges.
Hence the phrase "I could indict a ham sandwich."
It's not that different than when Bill and Hillary's minions got a hold of "raw" FBI files. It's just innuendo that hasn't been checked, and it's ripe for being leaked, and even better for blackmail.
Mark