I think that judging just from a length of time says nothing whether the person benefited from the therapy or not.
She has 30min every few weeks- sounds about right? No matter the topic the members should have more or less same length of time appointed to them.
I don't think there's nothing wrong with just wanting to be heard. Maybe she's not ready to change that behavior/problem/whatever and just needs to share it?
It's not your place to try and change her.
That being said, if you think that this doesn't work for you than I'd stop going. No reason to waste your time in there.