Cifer said:
(note a check, so your unnatural bonus won't help)
I think this one can safely be assumed to be unintentional - you've got Unnatural Strength, strength beyond the ken of any mortal man, but on the only test that depends only on strength, it doesn't help you? I don't think so.
Why would it be a mistake? There are calls for toughness checks in the game as well that don't benefit from unnatural talent, so why would this be any different? You can also make strength checks for pushing/lifting beyond your limit, but it wouldn't help there either.
To me (now I'm not a doctor or worlds strongest man champion by any stretch) it seems it's a lot harder to exercise your strength when you are trapped in a confined space, such as an iron suit with no power. When you're moving about and lifting, carrying, you use far more muscles to lift and throw something than you do trying to move your arm or leg, or open your hand.