I’m anti capitalist and explicitly anti commerce, especially with regards to large corporations, so. Whether it’s for piracy or not doesn’t matter. When I buy a game, I should have a legal right to do whatever I want with the data comprising that game. Including creating software to play it on other devices. It, therefore, should absolutely be legal to create and use emulators. Whether a particular end user is using it on legitimately purchased copies is beyond the scope of control of the creator of the emulator. This was already settled in courts in the 90s.
Piracy is also moral. It’s always moral to pirate content created and/or distributed my international corporations with income in the billions.