There is no reason to disable scrolling even if the primary interactions are supposed to happen with keyboard. I don’t want to remember which websites allow scrolling and which don’t.
I'd say there is a point. With disabled scrolling you can guarantee that the "cursor" will always be on the screen. With scrolling enabled, you could out scroll the selection, making for worse UI experience. I'm also not a fan of blurring the previous article, but I guess they chose to do it to put focus on your current selection.
