In an ironical sense,
Nintendo do care about its fanbase, most Nintendo fan here absolutely reject the idea of Nintendo releasing ports,
Nintendo is doing exactly what its fan wants in this regard.
Just look at how many lols and negative comment these op receive for even suggesting that idea, you get the point:
Example #1 Example #2 Example #3
When it comes to the other two brand I rarely see this unified reaction, its one thing from a business stand point that Nintendo won't do ports, but its another when the fans doesn't want it to be accessible to more gamers.
I guess the idea of "Nintendo doesn't care about its fanbase" doesn't hold water, its the people that cherished this idea doesn't understand what most Nintendo's fanbase truly want.