I don't know what your T means by that, and my T never has told me that. I see sharing stories of one's life as a very positive thing. "Discussing" sounds not as helpful, to me, like too analytical and not feelings-based. Also, I think if the T asks the client to "tell me a story from your life", it is very inviting, and less threatening than "tell me what is bothering you." The word "story" is an important one to me, in many areas besides therapy. In therapy, when I am having a hard time bringing up a difficult topic, I will sometimes help myself do it by thinking that I am just going to tell my T a story. It is reassuring and makes it more "doable" for me. It can also have a welcome element of distancing, like I'm telling a story about someone else. And this is extremely helpful in getting started on really hard material.

There is even a story-based form of therapy called narrative therapy.

So, for me telling a story in therapy is a very good thing! Hope your T can explain why he doesn't like stories and prefers discussions.