Why should they do that? They already have their own SNES emulator with Canoe (used for example on the SNES Classic Mini). It is much more logical to assume that they compiled Canoe to run on Windows for this exhibition.
I have and if the code is well written and prepared then such a port can be done with just a recompilation for the different platform.
Yes, often it is not that easy but the developers at Nintendo are neither dumb nor incompetent.
You're making my point for me though. Each of the other things you've suggested is more work than requires more expertise. Popping up an emulator on an existing box and dumping a ROM in there is something an intern can do.
All of these other things can be done, but they're not as quick and simple, and that's why we're seeing this in the first case - Nintendo went with a quick and simple solution, and someone found a bug (it still plays Windows noises).
You have your view at the world, a view where everyone is lazy on every level, and I have mine.
Thank you for the nice conversation and have a great day!