Someone didn't see the video[0] where the Facebook SDK, packaged into other apps, was sending all of the information plausible/possible back to Facebook - before the Terms and Conditions of the application could even be accepted.
The problem is far greater than you've perceived it to be.
[0] - https://media.ccc.de/v/35c3-9941-how_facebook_tracks_you_on_...
How is it a problem with Facebook when they have released this software free of charge for any developer to use? Again, just like the Facebook website, it is a product that they offer.
Also, how in the feck do you propose avoiding using apps with the Facebook SDK included? It's not as if such use is advertised by the apps, yeah?
From your argument, it's free, so why the feck should anyone complain? That's pretty banal: Trading subversive data practices for the cost of it being "free" should never have been an acceptable position for anyone to take, in the first place - no matter who it is.