The wsm athletes are already there imho. Pulling a truck isn't pure strength. There is plenty of endurance involved. The fingers require brute strength, a little coordination, and again endurance. Really the only lifts that don't require a heavy mix are the ones closest to powerlifting , like squatting barrels or deadlifting a car. They are definitely on the strength side of the equation, but that's ok. We have other events like the triathalon and marathon to celebrate endurance.
I have always looked at it like a science experiment. I have always been amazed at the difference in strength between say chimps and humans of comparable size.
http://abcnews.go.com/Health/Wellness/chimpanzees-humans-sizing-strength/story?id=16696826
So for those not watching the link, chimps are 4x the strength of humans of comparable size.Their tie-ins are more dense and they have less control over the muscles. By this they mean they go 0-100% very well, but in between is a bit more difficult for them. So this leads to the theory that while a bit different, there is something else at work other than physiology allowing their difference in strength. It has been proposed that humans have a internal governor of sorts that chimps do not have.
This is pure bro science on my part, but i have always thought training for strength is in part trying to remove those safeties, or at least push them up higher, allowing us to perform what most would consider superhuman feats. Things like people pulling cars off someone or a mother ripping a car door to get her kid out of a burning car are examples of extreme cases where these safeties look to have been bypassed. When watching Marius in the wsm events for many years my wife has commented that he looks completely nuts when absorbed in full effort. Maybe there is something to it.
Anyways, a bit off topic, but size and strength while related, are definitely not a linear tie-in. When i was talking about getting bigger earlier i was just really letting people know what worked for me and how my body type changed from 135 pound endurance athlete to 230 pounds and more on the strength side of things. Take it for what it is worth and for sure try things out yourself. Different strokes for different folks and all that.
I beat my head again the wall for years with different bodybuilding workouts with varying results. I most likely kept myself in a overtraining rut for long periods of time before simplifying it and finding an approach that worked for me. That is what we should do right? Try something for a given period, assess, back up, make some changes, attack it again. For me simple was better.