Flying toward a hill, the last thing you want to be doing is an ECAM drill with both pilots potentially looking in and down, you want to be looking UP and flying in that direction too hopefully.
I can just see it now:
NAV GPWS TERR AHEAD
PM - "NAV, GPWS TERR AHEAD"
PF - "NAV, GPWS TERR AHEAD"
PF - "My radios, ECAM action"
PM "NAV, GPWS TERR AHEAD, PULL UP"
------***HITS MOUNTAIN***
Getting out of there is the priority. A lot of issues have memory items and initial actions which must be recalled.
Fly and navigate are the priority. Everything else falls into the "stuff" category. It's all just niff naff and trivia compared to fly and navigate.