If Hutch admitted to be cuck, that would be the end of the story. The same if Hutch left her. Let me explain:
The crux of the story is two characteristics traits of Hutch's wife. Vivian Gardner and Dubois; lets give here the later a first name Kylie. The driving force of the story is the conflict Hutch's wife has to fight with herself. The moment Hutch admits to be cuck her conflict is resolved. Vivian and Kylie coexist without conflict, Hutch's wife may shift between Vivian and Kylie without any guilt. The moment Hutch leaves his wife, Vivian is dead, or at least totally suppressed (as Kylie was the last 23 years); in this case, the conflict is also resolved. Clearly, in this forum many opt for cuck, because it is a win situation for Vivian, Kylie and Hutch. However, what's the solution if being a cuck doesn't fit Hutch's personality? And that's exactly what makes the story happen and makes it interesting.