It is so complex, how some relationship work and others end, and both scenarios can be healthy for those involved. You raise a good point here, about the problem of sticking to a relationship at all cost (without critical thinking). I think if you have to turn your brain off to stay in the relationship, you're not showing up as your complete self, and that is problematic.
The word "dynamic" is also key: always taking time to reflect together and as a couple on what you value, as that does change. And if the changes are beyond what you can handle to be honest about it, and not compare yourselves to others. We're all different, and what may work for some doesn't work for others. But I think as long as we are real, we'll at least know that we gave it the best chance.
Thanks again for sharing.