> (2) The claim that a 93 year old lacked the dexterity to operate the smart lock is spurious. A physical key requires more dexterity than pushing numbers on a keypad.

In this case absolutely not. I've used the lock in question. It does not have physical keys, and the keypad is non-responsive, and round in shape (think rotary phone). Every person I know who has used the keypad has had trouble both on their first and succeeding attempts. I am pretty good with it, but it requires typing very slowly and using my thumb in order to ensure the key press is accepted.