That is literally what I just said. Wouldn't technically everything be a PvE if a determined outcome was in sight? Let's say I had a person captured and I was given permission to kill them on the spot. Is that PvE? No. A predetermined outcome would be like the shit Phantom pulled in Vigilance in RPL with the whole Delrose killed Kalamity business. There are actually many ways to go through and end a plot. Hell, most aren't even predetermined. June Bellicose is one good example of that. If it's predetermined, usually the plot OP will try to steer people on track or Rocks Fall Everyone Dies. Which is 99% never the case.