I'm guessing your ATS % is ~28%?? If this is correct it and you feel you can outplay your light 3betting opponent who is in the blinds, then it MAY be correct for you to fold ~60% to 3bets. Another thing to remember is that unless they are 3betting you more than 1/3 of your steals, every time you steal it is +EV. Also it is very possible for both you and the 3better to have be +EV in steal spots. Also find better seats!!!