@[email protected] showed me where I was confused. I thought YOU were calling this a moral issue; I just understood your comment wrong.
I am well aware of how Nintendo treats emulator devs, game modders, organizations that make better games in the same genre, and full blown ROM distribution websites exactly the same even though only one of these groups of people are breaking any laws.
Lutris is a game launcher for Linux that can install games from your GOG, Epic, and Steam accounts. I believe it even supports Proton which is a compatibility layer to run Windows games on Linux (which is a Valve project that is based on Wine).