/etc/sudoers file ignored or overrriden somehow? [duplicate]

Here are the contents of my /etc/sudoers file

$ sudo cat /etc/sudoers
#
# This file MUST be edited with the 'visudo' command as root.
#
# Please consider adding local content in /etc/sudoers.d/ instead of
# directly modifying this file.
#
# See the man page for details on how to write a sudoers file.
#
Defaults    env_reset
Defaults    mail_badpass
Defaults    secure_path="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/snap/bin"

# Host alias specification

# User alias specification

# Cmnd alias specification

# User privilege specification
root    ALL=(ALL:ALL) ALL

pkaramol ALL=(ALL:ALL) NOPASSWD:ALL
# Members of the admin group may gain root privileges
%admin ALL=(ALL) ALL

# Allow members of group sudo to execute any command
%sudo   ALL=(ALL:ALL) ALL

# See sudoers(5) for more information on "#include" directives:

#includedir /etc/sudoers.d

And here is what's inside /etc/sudoers.d

/home/pkaramol
$ sudo ls /etc/sudoers.d/
README

However, still no password-less sudo:

/home/pkaramol
$ sudo -k
/home/pkaramol
$ sudo -i
[sudo] password for pkaramol: 

Why is that?