FTDK
Nah sorry, can't follow your logic! LHR happened because the crew did not follow the procedure as it is writ -
It's a given they didn't follow the procedure as writ. IIRC there was a theory they been referencing their profile off the incorrect waypoint i.e using the wrong GPS distance.
Most GPS approaches count down 5,4,3,2,1,FF,5,4,3,2,1,MAP. In the heat of the moment, on a dark ****ty night, it would be very easy to look at the wrong No. 5 or 4 or 3 etc and attempt to fly the profile 5 miles low with disastrous results.
One any other approach (NDB,VOR,LOC,ILS) there isn't two sets of count down distances, they count down 10,9,8,7,6,5,4,3,2,1,MAP. Therefore making a profile check mistake very unlikely.
Hope you now follow my logic.