You are worried with good reason.
We had a Studio MKV room last May, 6th floor, and you could look out the sliding glass door and see a beautiful vista of... the Grand Floridian. One person could stand in the curtains beside the sofa and see the Castle, and there was a view from the far left side of the balcony, but it seemed to me to be quite a bit less of an actual MKV than others in which I've stayed. So, yes, technically you could see the Magic Kingdom from the room, but it was definitely disappointing that, after all the great stories about seeing Wishes from the rooms at BLT, we all had to stand out on the balcony, squished together to get even a decent viewing angle. Followed by hearing all the car alarms go off after the thunderous final fireworks.
Oh, also, I was told by a CM that if I wanted a "good" view of the Magic Kingdom, I should have gotten a 1 or 2BR villa instead of a studio.