Facebook has nothing to do medicine, exploration, or improving the human condition. Facebook isn't a business created to fund biomedical research or somehow make the world a better place, Facebook exists to collect personal data and serve advertising.
According to Facebook[1], they exist to "give people the power to share and make the world more open and connected."
I think it is arguable that Facebook has improved the human condition based upon anecdotal evidence of it mostly being positively regarded in our culture for exactly the mission statement above.
Whether we personally agree or disagree with this, right now, most of the world's population still seems to believe that Facebook is a net positive, and I would argue that even if people turned away from Facebook, it would still be positively regarded with some nostalgia by the majority of its members after its obsolescence.
Perhaps Facebook has strayed from that optimistic (and potentially naïve) goal, but in its infancy it didn't even have advertising, then had shitty banner ads, then had a pretty bad ad product, etc. Now they have a decent ad product. That is not very indicative of some type of pervasive corporate culture that exists to serve advertising.
Nope, Facebook is still in business to serve advertising. Their very long history of privacy snafus, especially Beacon, is quite indicative of this. Oh, and that part where they're a publicly traded company and 100% of their revenue comes from ads, user data being their product.
