I think the simple answer to that question is that there are a lot of creative ways you can suffer reprisals, which are not easy to link back to testimony at a committee. It could be administrative or a reassignment of duties. These are all things that have been flagged, throughout Operation Honour, as things victims have faced after coming forward.
The best I can say is, it's nice to hear that there are protections, but protections are only as good as that which you can truly enforce.