Should you be using a Switch wirelessly on a plane?
Well, it's probably a private flight...
I'm pretty sure it's a no-go on most (all?) commercial flights, though. But in fact, there's honestly no risk for the plane. The rules are half a century old, set when FM devices could reduce the SR of communications between planes and towers. You don't want pilots having troubles understanding the communications during take-off or landing.
Thankfully, all electronic equipments in a plane are efficiently shielded, and technology for communications have improved a lot.
A lot of flight have in-flight WiFi, now. They'll stay really cautious, and in a customer place you shouldn't do it if you want to avoid troubles with the airline company, but a wireless game on Switch definitively won't do any harm to a plane.