I don't think HB is saying to do it with any expectations. She is just stating what happened with her H.
Nothing that TG does is going to push her through the tunnel. Not guaranteed. It might have an effect, it might not. HB is not saying to have expectations, that will not work. She is going to exit from her MLC on her timetable, not yours.
Maybe you are asking if you should lead her out of the tunnel. The answer to that would be yes. Loving detachment is a VERY necessary state to attain to help the LBS lead the MLC'er out of the crisis.
I am sure HB or someone else can add to this explanation.