The breaking of the 4th wall in that example was to jusity an upcoming end-game status, and she was telling us to "keep a separated save for it" (because there's no coming back, the game ends).
You have to keep separate saves anyway for all the paths if you want to see all the scenes. Even on sub path there are some separate events for k1 and k2 vs k3 and k4.
If you start k4 and promote to k5 later you missed all the events which happened on the k5 and k6 path so far, so you need saves for k4, k5, k6 to cover the early game ... and good/evil Kane vs good/evil Olivia adds more complexity later on.
It's been explained multiple times how even with the most perfect accumulation of dominant points, Kane will never really have the same position the Karlsson have "right now", and the peak of his "power" would be at the end of the game.
The dom and sub points in early game can trigger some events in prison and cause dialog variations, eg when Pat talks about Kane, but Kane's first ranking (k4-k6) is based on "slavepoints" earned in the tests and not on dom/sub points. Strategic dialog choices like choosing "elena_mentor" are more important than dom and sub points to get K6.
Afterwards the game is split into the dom path (K5, K6, ...) and sub path (K4, ...), and dom and sub points are no longer evaluated while the VN follows almost kinetically the two paths.
It is a huge misunderstanding to believe the dom and sub points from early game would affect the later game (after the k4-k6 ranking) in any way. That misunderstanding is caused by the way dom/sub/good/evil points were prominently introduced by Tess in E1 back in 2020.