Here’s why, and remember, I’m not localizing my statement to Olympic lifts alone- but any training means that doesn’t fit what’s ‘optimal’ to the trainee in question as well as his/her training for their sport discipline.
Regarding sprinting:
The only training component that is absolutely, unarguably, necessary is sprinting itself.
Beyond that, we know the benefits of explosive jump exercises, explosive throwing exercises, and strength/explosive strength exercises with overload.
I’d be willing to state that most of the world’s elite sprinters would go so far as to state the sprint work and some form of ‘strength’ training alone is sufficient to attain world class performances.
So we can rule out sprint work because everyone must train that.
Then the question becomes how we will present the overload to develop the other necessary biomotor abilities.
Certain coaches opt to solve this problem via more explosive jump training, others with weightlifts, others with basic strength/calisthenic/gymnastic exercises, and others with some aggregate of all the above.
My feeling is that ALL coaches would be best serving their athletes by only having them perform the means that are necessary in order to further their sports results.
I should clarify that this statement applies to the most costly means (ergo the most CNS intensive) as one can take plenty of liberties with auxiliary work as its physiological impact is negligible.