The fact still stands that you don't really want the oboe played higher than that high F. A good comparison would be trumpet players. A trumpet CAN go as high as it wants, but it starts losing practicality around high E's, at least in the classical world. Jazz is a whole different story, but I'm not gonna go there. I agree that a discussion of range is the way to go, just setting a range is misleading
On another note, I knew of an professional oboe player who was teaching his students about hitting triple high G's. He literally had his students bite the reed to get the notes out. Dogs all around the world went deaf.
