Yes, I agree not everyone goes to therapy to work on relationships and not every t wants to work in this way by using the relationship as a tool. So it very much is an individual and circumstantial thing.
I never went to therapy to work on my relationships but current t really likes to talk about what is happening between us at any given time and I have learned a lot about my behaviour and the triggers behind my reactions to her and sometimes even acknowledging these triggers can cause ruptures.