What I think you are describing is not an "either-or" situation, but more like "some of both". Therefore, a "some of both" response might be suitable.

For example: you could decide that anger does not require work with your T, but it does require some sort of plan for use when anger threatens to get out of hand. The plan could consist of tasks that you set in place beforehand and you can rely on yourself to do when in the throes of anger. Perhaps standard ideas such as leave the room, count to 10, go to your peaceful place, use the STOP technique (search STOP Goldstein short on youtube, it was the first hit this morning, it is a 4 minute video), something you are confident will help in the moment. Then, with that safety framework in place, you could work on the flow, personal growth material with your T.

Or, if you judged it appropriate, something vice versa could be devised as well.