Quite, but in the case of the cameras - and with so many other things too - the process starts a long time before any of those drawings exist. For the Canon T90 and Nikon F3/F4, I should imagine there was quite a lot of the camera function engineered and designed before any styling input from outside. So the consultant stylists would have had some pretty solid parameters to work to.
Not trying to diminish the work of people / companies like Giugiaro, just get the balance. It's annoying to see Giugiaro credited as "the" designer of the F4, when so many other hands worked on it too.
There always were / still are some "designers" who take far too much credit for products on which they had almost no measurable input. I always think of 'Count' ( tee hee ) Albrecht Goertz as a prime example of this.
Now you're talking... cameras! A meeting of optics, electronics and precision mechanics that has to be squeezed in to a small, affordable package. Whenever people go on about how sophisticated racing cars are I always think they compare poorly to cameras.