Your are missing my point. You can have the same strength score and that strength can be applied differently.
I will give you two simple personal examples (though it goes much deeper and wider than these).
- My dog is smaller and weaker than me. His strength score is probably half mine at best. However, he is much faster than me (absolutely) and can pull more weight than me (proportionally). That can't be expressed by a strength score alone. He can apply his lesser strength differently than me to accomplish athletic feats beyond me.
- When I was a freshman at university I was on the track team, ran a sub 2 min 1/2 mile and could squat over 600lbs. At that time Mike Powell had just broken the long jump WR at over 29'. He was noted as being able to squat 600lbs. We had the same STR score, but there is no way I could long jump 29' even though I was a fairly highly trained athlete myself.
There are so many variables that go into a display of strength (training, morphology, mindset, culture, etc.) that it is completely acceptable, and realistic IMO and IME, that this could be, possibly should be, accommodated with more than a simple strength score.