Scando. You make a good point, and I have no argument with you. But...
I fly only in radar environment and have never had a problem with terrain (using radio alt, visual etc). Maybe it is not necessary to take the actions you prescribe unless it is for flights into the smaller airports and when flying non-precision approaches. And of course for departures, something not often considered.
I am not concerned about you and other pilots who are aware, but for those who visit such areas only occasionally. I have never seen any other pilot in the airline I fly with even consider such things but have not considered them to be in danger since as I say we fly with radar coverage into major airports, when I would imagine the controllers take extra care not to put them into danger. I hope, anyway.
I would also imagine that if one of my colleagues did apply corrections he would not tell anyone, which at the least will give ATC grief.