I'm not entirely sure it's the same. I mean, what you're describing is more a policy/decision debate. That is where principles like egalitarianism, personal freedom, and such are actually valid to appeal to since they're part of that-which-we-value.

It's not exactly the same thing as what the OP is talking about, is it? (unless person 2 is saying "because it is unfair, the study that implied those consequences is, in fact, invalid" rather than "even given those consequences, it's still worthwhile because this value here is so important")