the required mnemonic or a keyphrase to be able to use web3 are complicated,most of us doesn't want to remember a keyphrase,especially when you could not recovered it,in hive signer,you could sign in just using email and password without the need of extension or wallet to sign in,and you could reset your password as well with your google mail,if i'm not wrong,you could sign in to ambire wallet just using email and password and reset the password i mean look at this,no ones want to remember this