It's fear and nothing else. If you think instead of default to fear about such scenarios you could realize that there are countless solutions that people have been using as these fears are common and expected. The compromising of an entire foundational framework for these unmanifested and irrational concerns is not a solution but a unnecessary and irrelevant change that would doom the platform should it be implemented. Considering the problem that we are trying to solve it's obvious that this is not an actual problem, even if this manifests, and if we give into the fear of this "if all the whales are coerced" then I hardly think it would matter, regardless of privacy.
As I said you have all the privacy you need on steem, I'm sure there could be an app to encode data and posts that that only people with the key can view them, but that doesn't require changing anything to the platform but adding more functionality.