It's not about morals, though, Robo.
Some people don't know enough about alternatives to trust them, so they default to buying official products. Some people don't even know there are alternatives and only trust their brand name recognition. Some people just find stock in buying 'canon' things, and the fact that it's an official Nintendo product by itself adds value.
I agree with the mentality of emulating everything, especially to spit in Nintendo's face for their shitty practices regarding their IPs, but you can't ignore the large audience that exists that wants the official products that Nintendo is screwing over.