I think this is just generally good advice anywhere when you find yourself providing feedback or constructive criticism, especially if there's a potential for a power dynamic. You absolutely nailed all the right reasons why it's effective, and I do it all the time.

The only real downside I run into is that sometimes the questions get answered too earnestly, and I end up with the person on the other end helpfully trying to educate me rather than engaging the question or issue directly. In every case, though, I could and should have phrased myself more clearly. It's a constant learning process, but the system works.