The Wii doesn't specifically use a rom, other than a console reversion.
ROM's on the other hand for PC, are open to so much that it just takes away from the game.
At least in my opinion.
Great games deserve to be played the way they were meant to be.
That literally makes no sense.
There's nothing wrong with using a rom.
Now if you want to *** about using save states and using codes, etc. That's another story, but there's nothing wrong with playing it via a rom.
Now that being said: nothing wrong with using save states to save yourself a lot of frustration in getting items that are for no reason other than player trolling missable, it's literally just a time saver at that point. But I've also done it the other way, just is more annoying to have to walk back each time.