Should I be stealing with hands like JT knowing that chipstacks relative to blinds are so low that a blind will almost certainly come over the top holding an ace and maybe even two pictures?
Theres an easy way to avoid being put in that position and thats just to push preflop. 5 handed, a raise UTG wont scream as much stregth as it would 9 handed so i'd probably push over the top myself if i was shortstacked and found a any pair or a decent ace in the blinds.
At least that way, i get 2 chances of winning the pot. 1 if you fold and the other if you call and i win. However, if you push preflop i lose 1 of my options so i wouldnt be as quick to make any marginal calls.
As far as your original question goes, i'd make the call with KQ and JT because unless your facing an over pair, you have the odds.