I agree in general with your point asnoman that BB and PE aren’t perfect analogues, but there is a principle in BB that different bodyparts respond, or grow, based upon completely different types of training. Therefore the repetitions and sets required to build bigger arms isn’t the same workout necessarily you would use to build your chest or back.
Also, muscles grow without working them to the brink of failure, an idea that is frowned upon in many BB circles.
Muscles and the penis to be sure don’t grow on exactly the same principles, but I do believe bodybuilding can offer insights in to how to train the penis for more size, especially the concept of rest days.
The PE workout you cited in your last post may not give you 20 inch guns, but after 12 months to 2 years, with minor tweaking, I bet that workout would cement a solid 1 + inch gain on your cock.