bodybuilding splits are all well and good when you're so advanced you need to absolutely trash your bodyparts to grow, and so need a full week to recover before you train that bodypart again.
Beginners however can train everything two or three times a week, which is why I always recommend upper/lower splits.
That wasn't my point right now. Bodybuilding splits are not my cup of tea, but I got nothing against it. The point was that this split in particular has two and a half workouts for upper body. Including isolated work for back, forearms triceps, biceps, shoulders and pecks. Then it has half a workout for "legs". That's it. So you isolate everything from little wrist extensors and elbow flexors but you give half an hour to knee and hip in total? Surrounding these joints are quite the handful of muscles. BIG muscles. Point was that you could maybe seperate posterior and anterior chain work here. Or seperate hip and knee movements. Something like that. Not just do two exercises of leg work, the same amount of time you waste doing different variations of wrist curls. That was the point.