We record and use your typing pattern in order to protect your account from being hijacked. You are only being asked to type a text when you log in from a new browser/device or when you want to reset your password. We believe that every app you should implement 2nd factor authentication and typing biometrics are easier to implement, smarter, and better than all the others method we know.
Alternatively you can use SMS authentication. If you chose to do so you will receive a passphrase to the phone number you entered at enrollment.