There is only so much you can do with a Mode 7 track editor. Mario Maker provides a massive catalogue of obstacles and power ups for the creator to use as they see fit, an OG F-Zero maker won’t provide even a fraction of opportunities. As a standalone software it doesn’t make business sense, but it could be an expansion to 99.
They are letting the investors know in advance they won’t talk about Switch. The Japanese Twitter account is used for these kind of things.