Nintendo is something of a family company but a larger reason why is because Miyamoto and several of the older creators that went on to higher standings in the company never really wanted to make those types of games.
For Miyamoto, he's gone on record in the past of not wanting to make games he couldn't play with his kids (grandchildren at this point). Some of the younger guys obviously wouldn't mind going for more "mature" subject manner but at this point, Nintendo is unlikely to do anything like that outside of through second party developers.







