Angela,
While I agree with everything you touched on, in my specific case I am not working with sprinters exclusively.
In my mind, to effectively develop all of the requisite abilities needed by a quarterback (I’m talking holistically), the exercises that I have mentioned must be programmed into the yearly plan. However, they are not always present.
For the general client or even sprint athlete, these is no need for these specific exercises. Other means are used to develop fitness and all the needed bio-motor abilities to be successful and perform optimally.