Yeah I'm not really sure what the point is here. They DO already publish indies - that's basically what the point of "Nindies" is.
Having a specific "Nindies" division would basically mean they're published under the Nindies publisher name instead of strictly as Nintendo, but I feel like that could potentially actually be a negative.
Nindies doesn't publish games. It's just an umbrella term Nintendo uses for indie games on their platforms. What I'm suggesting is something like Devolver Digital, or Square Enix Collective, where they publish and produce games from indie studios who don't have the financial resources to self publish their own games.