Why not give people the choice?
They can choose to expose all of their personal medical information to the world for public consumption and sale, or they can keep their information private. Better yet, allow people to sell their medical information to companies.
That way people who enjoy their privacy can keep their privacy. People like you who care more about data can have their data. Everyone wins.
The major problem here is the brokering of private data, not only without consent, but also without any knowledge that it is happening.
As a side note, since you're so fascinated with the transparency and the data-driven-without-consent thing...
We should also have access to all of your financial transactions, too. After all, bad financial situations can cause lower standards of living which also affects health. We should also have access to all of your communications - email, instant messages, phone calls - so that we can use that to evaluate your mental health and build a graph of your relationships. We should also keep tabs on where you are at all times in case you are making bad decisions like visiting "the wrong part of town".
After all, just think about how all that data can help!
If that is how you want to live your life don't let me stop you from living it. You can do whatever you want. Just don't force me to live it as well.