The BIP39 requirement is important in the cryptocurrency environment as it supplies a way to generate deterministic wallets

https://papa-wiki.win/index.php/Unlocking_the_World_of_BIP39:_A_Comprehensive_Overview_to_Mnemonic_Expressions_and_Word_Listings

The BIP39 standard is vital in the cryptocurrency ecosystem as it provides a way to generate deterministic wallets. By using mnemonic phrases, users can restore their wallets across different platforms while maintaining security and simplicity