I don't really agree with that, but I agree about it being unfortunate that some of their more overlooked franchises continually are ignored.
I think it's just a consequence of their business situation. Without much in the way of outside support on both the Wii U and the 3DS, they try to focus on the projects that offer the most bang for the buck. Right or wrong (I'd argue the latter), they go after the projects with the widest appeal.
I think they're the worst off for it.