@shri, modern aircrafts are fitted with a Ground Proximity Warning System, even sometimes on light aircrafts, that has both visual and audio alerts. The below video - very very famous in Aviation Training Organizations back home - is used to illustrate what is called "tunnel vision", which happens when, focused on a task, some of the pilot's senses are inhibited.
In the video, the pilot on the left has several thousand hours of experience, and the guy on the right is an instructor. And no, their licences are not fake !
I presume our Pakistanese pilots without proper licences would have been pretty focused during their approach !