They want to take their content and squirrel it away in their vault, so for like 10 minutes you can buy the emulated recreation of some obscure title on some future platform where it's digitally tied to the device and the online Nintendo store you bought it from, so when the console inevitably breaks or the store is shut down, you lose access.

All of this for a premium cost for a decades old game of dubious quality that only has value because of your nostalgia.

So stop emulating games so Nintendo can decide when they will gift you with the privilege of paying far too much for a game they didn't make, which has a life expectancy, which will expire when they want it to.

Also piracy is bad! So stop it.