I think the point is that the opportunity was not there and the "friend" knew that when she asked for the advice. I agree with the point on the FSBO, she was clear about that from the beginning. On the other hand, she hid that fact that she was loyal to Agent B when she asked for advice initially. Had she said, I will try to market my house, and if that fails, I will list with Agent A to whom I am loyal, but would you come over, give me a price point, and tell me how to stage my house for nothing, then it would have been fine.
By saying oh no, we're loyal to person A, it's saying there was never an opportunity. She didn't say, I like A's marketing plan better, I think she knows the area well or anything like that.