It's been my experience that this is very generally true, and you don't need the "finance" qualifier: people hate having their roles demystified to the point that they often don't even try to improve their own understanding of it.

Even if the person isn't greedy, they'll resent the loss of status that comes with, "wait, all you do is add entries on the CMS interface?" or "all you do is make the risks less obvious to auditors?"

As Mal says, "50% of the human race is middlemen, and they don't take kindly to being eliminated."