If I am ahead of my opponents range I will usually raise for value.

Even against a fairly tight utg pfr raising range say 10%

Text results appended to pokerstove.txt
equity win tie pots won pots tied
Hand 0: 41.898% 41.23% 00.67% 504046752 8187948.00 { 77+, A9s+, KTs+, QTs+, AJo+, KQo }
Hand 1: 58.102% 57.43% 00.67% 702162408 8187948.00 { JJ }

With this kind of equity I am definitely getting more money in the pot. (It also gives me the iniative in the hand which greatly increases the ev of most playable hands.)

Regarding if I'm happy stacking off with JJ vs an utg player in a vacuum it's just a maths question of how much of his range he's 4betting.

if his 4bet range is the usual 2.5% or less (QQ+,AK) then it becomes an easy fold and I'm happy I made my hand so easy to play.

If his 4bet range is greater than 4% then yes I'm stacking off in this spot with a smile.