Wikipedia's premise is that anyone can edit an article. While it's true, whoever tries to edit articles (especially of living people) knows it's not that easy to make a claim stick. There is a ton of community made editing rules, and the willingness to enforce those rules varies a lot. For some pages, it sparks really long discussions, and you can see the politics unfolding in the articles' talk pages where a consensus has to be reached. In the end, it feels like a game of whoever gathers more "editing time": the "party" with more time has the resources to do the "final" edit, so they "win".
In that system, who has the final say in such editing disputes?