Certain apps will always time out and require you to log in each time you access it. This is especially true of any banking apps. If you don't set a biometric, you will be asked to sign in with your username and password. Fingerprint is so much more convenient. How hard is it to place your finger on the sensor to get into your app? Or are you comfortable with the fact that anyone who gains access to your phone has access to those apps? Security measures are a) for your protection, not to annoy you, and b) set by the app developer and has nothing at all to do with Samsung (unless it's a Samsung app).
