I think the point of the linked article is that the same reason that makes you recoil at that, and the same reasons that would make these coming hell-days so dread-inducing- those same reasons apply to an 8-hour day, just to a lesser degree.
It's not about extending the weekend as much as possible, it's about shortening the part of each workday that you're "working", and reducing the mental burden of each individual workday.