Mnemonic seed?

[o_e_l_e_o]

-snip-

I mean, sure, a passphrase makes no difference if an attacker is just blindly brute forcing seed phrases or private keys. However, the change of someone having their coins stolen from an attacker brute forcing a 2²⁵⁶ space is astronomically smaller from the chance of someone having their coins stolen from someone finding their seed phrase back up, or coercing them in to revealing it, or them accidentally exposing it online, and so on, in which case a strong passphrase can mean the difference between losing everything and losing nothing.