I understand Gambi's point of view
One of simple illustration is like " players need to know who handle their report, like is the said staff have a problem with us or no with their primary account?" It's like it can affect their objectivity on their decisions and if we know they have a problem or being unfair with us, we have our right to forward our report to other staff.
In addition, I believe if the staff itself is trustable, fair and doesn't harm anything to us, it's not a problem for them to reveal their identity. Also, we (players) can monitor their player account as well, about their attitude when use their primary account. We did this in the past though and I didn't see any problem with that.
Although, I don't have a problem with this, but I can understand for those who have a trust issue and threaten unfairly by some staffs.