The Niche Zero (and the 63mm conical burrs it sports) has it’s own taste profile. It’s not only about the burrs, it’s also about the speed, burr chamber design, etc, etc (only talking about taste here, rather than workflow). It works better for certain type of beans and methods, like any other grinder out there. In a way, it’s like saying the Duo doesn’t do filter brews with the espresso burrs. Of course it does, but it might not be optimal.
Does the Zero work for light roasted coffee? In my opinion, it does. See my post here: https://coffeetime.freeflarum.com/d/1605-niche-duo-83mm-flat/648