I hate Nintendo as much as the next guy, but this isn’t answering the OP’s question in a reasonable way.

From the post I am assuming they don’t want something fiddly like emulators for a “current” system that keep getting taken down and you have to hunt for a new one constantly. Another comment also mentioned performance being an issue for Switch emulation on the Deck.

This might be a solution for some, but it definitely isn’t for everyone.