A mm unit does NOT describes the field of view. A mm unit on a lens is a focal leingth. It does not matter if you project it on a "full frame" camera, dx sensor or a sheet of paper.
But field of view is an angular dimension which needs to take into account other factors like size of the sensor, shape of the sensor, distance to the sensor, plus some internals of the lens, like quality of the image arround the borders for example.
The problem is not the names used. They are right. The problem is what new photographers expect from a camera.
I understand that some photographers that used a 35 mm film camera all their lives need to understand the crop factor to preview the results compared to the other format.
For a photographer that was used to handle a medium format camera all his life, the 50mm lens as a "normal" lens, has no sense. It is arround 80mm.
So new photographers need to know its own equipment. A "normal" focal lens on some cameras is arround 30-35mm. Period. The user needs to get used to his own camera characteristics.
On pocket cameras yes, probably a manufacturer can fake the focal length equivalent, because nobody cares of the sensor size on a fixed lens on a pocket camera, on an mobil phone.
But if you have any kind of interchangable lenses, you need to know your camera and stop comparing it to a "full frame".
Probably
Probably what photographers need to stop doing is calling a 35 mm sensor, "full frame".
All cameras are full frame. All cameras make use of its own full frame.
A medium format digital camera is not called by any means humongus frame. It is a bigger frame than others.
We should stop calling a sensor "crop sensor" it is a sensor of diferent size.
A special case
On 35mm frame and reduced size frames o cameras like Nikon, Canon, Sony, there is a special case because you can interchange lenses between them. But a 50 mm lens is a 50mm lens. If you change lenses you should know what to expect. If you exchange bodies you should know what to expect.
