Had a feeling it was going to be something like this sooner or later. Just from the way the first few sentences are structured, coupled with how Oda has had major characters (Whitebeard/Roger) describe the use/nature of One Piece in regards to starting a war, PLUS the fact that Oda himself believes things outside of Luffy's actual voyage (i.e. Marineford and Impel Down) are legitimately "side-stories" should make Artur's translation seem off. To me, it sounds like Luffy's adventure is what ends, but not the actual plot of the manga. Sailing to Laugh Tale and finding One Piece is what finishes, but not the ramifications of a huge war that are waged after.
Lets not even get into the fact that 5 years, including what is left of Wano, even virtually seems like enough time to resolve OP's plotlines, especially with Oda's pacing. Idk, I'm super biased towards one view so I'm surely not helping.