We are all constantly learning and evolving
The 70-200mm f/2.8 lenses are Pro everything photo journalist lenses and does everything to almost perfection.
I of course agree that the 200mm can't exactly replace shorter focal lengths, however it can mimic the look and feel or even surpass it, depending on style:
For my work ie. If you are able to manipulate distance to subject and subject distance to back ground, then the 200mm f/2 can replace/surpass the 85mm f/1.4 and 105 DC, 135 DC as well as 180mm and 300mm (maybe except the 300mm f/2 I have never used it)
What i'm trying to say is;
With the complex internal focusing and floating element lens designs of later years the shear size of the front and rear elements and of course the overall design, makes for different qualities not related directly to focal length and aperture value.
To our advantage we now can pick now from many different looks