Half-Thor also uses wrist straps, Coan pulled over 9 hundy without. That’s the difference in strong men and powerlifters.
Leverage is an advantage, yes, but leverage only goes so far. Just because you’re 5’5” doesn’t mean you’re going to pull heavier, bench heavier or squat heavier than the next guy. To be able to pull those numbers takes pure raw strength, no matter the distance the weight moves