No. This is a common point of confusion.
On an unmodded system, these seeds are downloaded automatically from Nintendo’s servers when you install a game or update. For homebrew users installing files (like .CIA files) offline, tools like GodMode9 or custom-install need a seeddb.bin file to provide these missing keys. Where Is It Located? 3ds seeddb.bin
: It is a required file for PC-based installation tools like Custom-Install 3ds seeddb.bin