This seems to be a relatively new practice. They have clearly understood the message from Madam Arbour that the instructors have to be top-notch. You can't just be sending people there if you don't really know where to put them. They have to be the people who can really talk about the right character and so on.
I asked them what they were doing about this. They said that they are trying to ensure that the right people are sent. This is where they said that they have even gone to the point of being flexible enough that if it's not the right rank necessarily, but they know it's the right person, they will make arrangements to make it work.