utg has an ace, a king, or a queen a lot of the time when opening from UTG = discount QQ+ combos from the shortstacks range, as well as the obviously fewer combos out there when we hold blockers etc.
Somehow i thought this was 4nl when i first replied - this isn't a fold vs the 40bb jam cos JJ etc. Stats/reads on UTG are important however and you don't provide those.