You're misunderstanding me.
I've read that article too many times. Dan Green certainly use various BBing methods but he still has a much higher frequency and specificity to his training than the typical bodybuilder doing a 5-split. Dan green has templates with up to 4 times squatting a week. He has several timed voiced his opinion against the powerlifting program with the most focus on isolation movements and that muscles growth drives the big three up, which is the Westside method. There's another article by him on that site where he basically said that assistance work such as JM presses and reverse hypers didn't do as much for his bench and squat as simply benching and squatting more often, that is increasing frequency.
I did not say tht top powerlifters use less performance enhancing drugs. I said that bodybuilders have better genetics for looking good and use synthol and muscle "ballooning" drugs which powerlifters don't and that is the main reason professional bodybuilders look better, not because their training method is superior.
More frequency does not equal less volume. In fact, look at Stronglifts 5x5, whick many people see as a low volume program. 3 days of squatting 5 sets and every other training day deadlifting 1 top set equals 15 or 16 heavy compound sets a week. That's not too far off what tou would do on a leg day with a 5-split or whatever. With stronglifts (or any other sinilar program) you could easily add in 3-5 sets of lounges every session and you now have over 30 sets for legs every week spread over 3 sessions. 30 sets on one leg day will not be as productive as your overall intensity will go down due to fatigue and tou will have higher DOMS and more fatigue as a result of the extreme volume in one session. This is just ny view on the subject and what I percieve as benefits of a spread out volume over more sessions.
Strongmen do have lower frequency with their sports specific "event training" but that's mostly because the strongman lifts / exercises are extremely CNS demanding with tons of very carries and deadlift variations. High frequency event training would burn most people out too fast.