Here is some fodder for discussion. I have noticed that even when the "low(er) volume" high intensity guys attack a weak body part, it seems they tend to add volume? I am a big DC fan, but even he prescribes more volume to weak bodyparts. This is a post he put on his IG page:
"This is what I really like to see advanced guys do
Sunday: chest 3-4 exercises (and you work one key exercise on shoulders or triceps on this day if those bodyparts are weak)
Monday: Biceps 2 exercises, Forearms 1 exercise, abs 1 exercise, rear delts 1 exercise, calves 1 exercise (and you work one exercise for back only if you have a serious weakness there)
Tuesday: hams 2 exercises quads 2-3 exercises
Wenesday: off
Thursday: shoulders 3 exercises triceps 3 exercises (and you work one exercise for chest if your chest is a weak bodypart)
Friday: Back width 2 exercises and Back thickness 2 exercises, calves 1 exercise, abs 1 exercise (and you work one exercise for biceps if thats a weak bodypart)
Saturday off."
Notice weak bodyparts are prescribed additional exercises (volume). It seems like common sense...when you have a weakness you do more to fix that weakness. This dates all the way back to Arnold who supposedly trained calves daily to bring them up. Yet, at the same time, many really successful guys tend to downplay overall volume.