WSM is the arena of functional strength. Bodybuilding is that of fictional strength.
I always laugh when I hear "functional strength". Most pro bodybuilder can easily deadlift 700 and bench 500. If that's not strong enough to do your function then you need to hire a forklift or crane. By the way these guys are way bigger than Jay, they can thank their parents for that. If you shrunk them down to Jays size they wouldn't be much stronger than Jay.
Remember the vid of Platz squatting 500 for 23 reps? Well that was part of a competion he had with Fred Hatfield, "Mr. Squat", although Hatfield lifted more poundage than Platz, (he outweighed him by quite a lot) when it came to repping out with 500 he gassed out at 11 reps.