Can we think of boundaries as a tool on the mental plane that we need in duality to define the "I" from the "you"? As a kind of tool of conscious thinking to enable the next developmental step?
To me, the Eastern philosophies are very much coming from a place of love and holistic experience, hence no need for explicit boundaries. On the face if it, much of Western thought is still fear-based and exclusively reliant on the mind. However, if we look at our genius physicists (I'm a huge Einstein fan), for instance, the quest to define the smallest part of the material world (setting boundaries of the atom, nucleus, electrons, photons, quarks, etc.) inevitably leads them to talk about energy fields and interconnectedness. Or about the wave/particle phenomenon of photons, depending on how the observer looks at this particle of light.
I guess what I am saying is, to me, boundaries and integration are necessary and in no way contradicting elements of the human experience of duality and human awakening to oneness.