A user with a hacked Switch (using Atmosphere or similar CFW) can install the extracted NSP file using title managers like Tinfoil or Awoo Installer. This allows them to play the game without buying it from the eShop. This is widely considered a legal gray area; dumping your own purchased game is arguably protected in some jurisdictions, but downloading an NSP from the internet is almost always copyright infringement.
The developers and publishers of "Bloodstained: Ritual of the Night" have explicitly stated their stance on piracy. In various interviews and statements, they have emphasized the importance of buying games through official channels, highlighting the value of supporting game developers and the gaming industry.
Even if you ignore the legal risks, downloading a file named from an unverified source is a security gamble. Cybercriminals often disguise malware as popular game dumps. Common threats include: