Quote: "He's actually right: the least the superuser's password is
used, the better
and the safer."

Granted, but sudo as configured in Ubuntu makes the use of a superuser
password pointless. Sudo is configured to be a wide wide open door
leading to any part of a computer's 'household'. In other words, sudo
with the infamous 'user ALL=(ALL)' in /etc/sudoers makes root
practically like any other user.

Sudo does have its benefits but it must be used to control user
privileges. Granting all commands to every user is the opposite of
what security means.


--
If you can't explain it simply, you don't understand it well enough.
(Albert Einstein)
If you cannot make abstructions about details you do not understand
the concepts underlying them.