I would bet serious money that this is because of the upcoming Switch 2. If the rumors are true, it could very much be like how the Dolphin emulator is able to run both Gamecube and Wii games because the system architectures are so similar. Nintendo wants to avoid a day-zero emulator for Switch 2.
that's good and bad news for Switch 2 emulation..
And even if it wasn't a day-zero (or even several month in) Switch 2 emulator it's seeming like one of the big selling points of the new system is going to be "play your old Switch games on the new system, now in higher resolution" but it's a lot of bad press if that's still "play them in worse quality than emulators were 3 years before this hardware came out".