The generally accepted legal standard for emulation enthusiasts is "format shifting" or "archiving." If you personally purchase a physical Nintendo Switch console and the games, you have a legal right in many countries to create a backup copy for personal use. Extracting (dumping) the keys from your own console is considered the only legitimate way to obtain them. Security Risks of Third-Party Downloads
Stop distributing any Nintendo intellectual property. Consult a lawyer if you have distributed keys publicly. download bios nintendo switch
Nintendo actively pursues legal action against sites hosting Switch firmware, keys, or emulators. Using downloaded files puts you at (theoretical for end users, but real for distributors). but real for distributors).