Earlier quoted context omitted.
Because this is how all operating systems work. If Microsoft wanted to give special apps access to your private data without asking, then that is exactly what would happen. The same thing is true in Linux, other than we'd expect that the open source nature would have users going "Yo, WTF"
That's like saying "because that's how locks work, the company who sold you the lock can just come open your door".
I mean, we just allowed Car Manufactures to pump as much contact data and location data as they can off your phones and sell it to whomever they'd like risk free and legally.
We have laws against physical trespassing, but when it comes to 'data' trespassing on applications that you install or come with your phone we're still in the wild west.