Earlier quoted context omitted.
That's what the biometric access is for. Choose a strong password, use fingerprint or face-reader for quick access.
I don't know. I'm not comfortable giving any software access to the fingerprint sensor (I've also taped it off), and definitely not as means of authentication.
Seems much more secure than having a three-letter passphrase, but fair enough.
You can still encrypt the backup with an additional layer when you back it up. I use the E2EE in Nextcloud for folders with sensitive info, that works quite seamlessly.