I also think that a rupture/disagreement/conflict doesn't have to mean an ending. In fact, that seems to be the default anymore (generally speaking): you have a conflict? Run. When in fact, most conflicts can be discussed, resolved, accepted, moved beyond in life.

I do think if the conflicts are constant, irreconcilable, blatantly unethical, etc., then a client needs to be willing and able to stand up for their own well-being and separate. I suspect that is the kind of rupture you are tuned into. However, many of the so-called ruptures (I really don't like the term) are relatively minor and can be worked through in a way that can actually be learning and insightful experiences.

I've personally never had a rupture with a therapist, so those are just my observations from having been around here for a long time. With my own therapist, we certainly don't agree on everything and it isn't all rainbows and butterflies, but we are both very good about directly confronting the issue in the moment, communicating with each other, and getting through those moments without it having to turn into a major issue between us.