Exactly.
What can’t they learn from the means they had prior to Facebook (listed above) compared to what they can learn now? I’d venture to say not a whole lot more.
Or are we saying that people have been blindly getting hired and now Facebook allows managers a way to ‘see’ (so to speak) and their hiring decisions are now more accurate. I doubt they are. KrazyKid hit on the head. There are people who are a complete mess outside of work who are the perfect worker in the office and vise versus.
It’s BS and like JP said, people making Facebook out to be a bigger tool/useful feature than it really is.