If the doubling pair is good enough to make a stripe tailed ape double on purpose, then they should also be good enough to know not to do it in a weak field. Same thing goes for some sacrifices that are right in theory. In a weak field, if it's the opps' hand and they get a plus score, you're probably getting a bad score. You're definitely getting a bad score if they didn't screw up, even if the hand was easy. At the same time, when it's your hand, unclear, or when the defense is difficult you shouldn't have to work as hard to get a good score, which should more than offset the previous factor.