I think you misunderstood what he is saying. He is pointing out that there is an imbalance in the program's setup, not that you shouldn't train the "mirror" muscles just as hard. Too much pushing and not enough pulling. In a bodybuilding style setup, this is almost inevitable to some degree, but pains should be taken to alleviate such a huge gap between the pushing and pulling. My shoulders fell off just reading the above routine!
I would personally favor a simplified approach, sorta like this oldy but goody from a 7 year old thread by Cephalic Carnage (FWIW, any natural trainee or beginner would do well to search "Cephalic Carnage How do you train" and read up).
This is part of post 236 in that thread:
...here's a 4-way into which you could incorporate Wendler 5/3/1 (use
the loading parameter table where wave one is 65%, 75%, 85%, don't
forget to take 10 percent off your max, and always go for extra reps on
the last set except on the deload weeks. When deloading, don't go to
failure on your assistance work or even use a little less weight or so)
Day 1 - Chest/Back
-Low-Incline Bench 5/3/1
-Flat DB presses or HS machine presses ramped up over 3 sets or so. 6-12 on top-set, or 8-15, whatever you want (7-9?).
Rows 5/3/1 (could do rack pulls or deadlifts here, but you'll then
pretty much be limited to machine work on leg day if you don't want too
much low-back overlap) If you do rows here, you pretty much
don't really row with your biceps or anything. You sort of shrug the
shoulders backwards and retract your scapulae, as if you wanted to get
into PL bench position. That should bring the bar pretty much against
your abs already, unless you have very long arms. It's important not to
turn this into just a bicep+lat exercise, but actually hit your
-Rack Chins/Pulldowns/Pullups/HS lat work.... 3-4 sets, ramped, 8-15 reps on top set
Day 2 - off
Day 3 - Legs
-Back Squats 5/3/1 (or front-squats or whatever)
(could do a leg-press widowmaker here, no warm-ups necessary, normally)
Stiff-legged Deadlifts or reverse hypers or glute-ham-raises or lying
leg curls... 3-4 sets, might want to go a little higher in the reps,
8-15 where you can... Obviously difficult with glute-hams.
-Calf work 3-4 sets, ramped... Either DC calf-protocol or a regular set.
Day 4 - Delts(+Traps if needed)
-Overhead Press variant (Smith High Incline Shoulder Presses or HS or whatever) 5/3/1
-Lateral Raise Machine 3-4 sets, ramped, 8-15
-Reverse Pec Deck 3-4 sets ramped, 8-15
-Shrug Variant (if you want), 3-4 sets ramped, 8-15.
Day 5 - Arms
-Tricep Press variant (In-Human Smith, Wide-RGB Smith
with DC grip, Elbows tucked CGP PL setup, HS Dip Machine, Close-grip
Board Presses elbows tucked...) 4 sets ramped, 6-12 or 8-15, your call.
Alternatively you could even use 5/3/1 here, too.
pullover variant (PJR pullover/extensions, Lying EZ extensions from a
dead stop behind the head... Lie either on the floor and don't use
bigger plates than the 22.5's or whatever you guys have, or lie on a
bench and let the bar rest on the bench behind your head. Keep upper
arms at an incline..., Rolling DB Extensions, Face-Away/Scott
Extensions) 3-4 sets ramped, 8-15
-Alt. DB Curls, EZ Curls, whatever. 3-4 sets ramped, 6-12 (or 5/3/1 if it's a bar-curl and you want to try that out
-Pinwheel Curls or Alt. Hammers or whatever, 3-4 sets ramped, 8-15
(you can do some machine curls + pushdowns here if you want)
Ok, this is a fairly basic BB routine, 5/3/1 imo doesn't work too
well with higher frequencies, but it should be ok to use with this one.
Waves are 1 week, then.