Isn't it weird that Nintendo hasn't made a new Mother game?

I'm not even talking like it's innate popularity. Undertale outsold the entire mother series and it's basically a weird version of that series. There's probably a hundred mother/tale clones at this point so obviously people want this type of game. I just don't understand Nintendo. Did the creator of Mother spit in the face of the president of Nintendo 10 years ago or something? Did you know there's a direct made by fans for the making of so many new games???