I agree that the heart it's about privacy, and what compelling reason we would have as a society that would supersede privacy.
I don't think the idea that benefiting one party's negotiation is such a compelling interest. In the case of Disney, it sounds good because it benefits the perceived Underdog, but It can just as easily cut the other way, especially if you extended to how bad you want something as some people in the thread advocate.
Maybe you want to buy a specific house cuz it's next to the Medical Center where you get treatment. That would probably influence how much you're willing to pay.