I feel you're been needlessly pedantic here. Sure, the reader always has to parse each sentence and understand it. But that's pretty different from the author deliberately introducing a non sequitur that cannot be understood until the later resolution.
> It's just a totally different structure.
What skybrian is saying is that, yes, at one level the structures are different, but at the next level of abstraction there are commonalities. In both cases a tension is created in the reader which is then later resolved.
In conflict-based stories, most of the tension comes from the reader sympathizing with the protagonist who is directly experiencing the tension. In kishōtenketsu, the reader experiences a tension the characters do not because it's not "in world".
Even in Western literature, this technique is used all the time. Foreshadowing is common. Many stories shift viewpoints between multiple characters so that the reader has access to insight the characters do not, and that's used to deliberately create tension and anticipation in the reader.
Some stories are intentionally more difficult to understand until you've read far enough. In this sense, the author is setting up a problem and resolving it.
Kishōtenketsu specifically doesn't set up a problem in the classic western sense. There is no apparent obstacle that the protagonist needs to overcome. There are no "stakes" that we are worried about (what happens if she doesn't get what she wants?). There is no antagonist. There is no rising action where conflict+stakes increase over time. It's just a totally different structure.
There is a twist at the end, but a twist is not a conflict.