Nike bought Cain for Salazar w/ the assumption she would seamlessly move up to 5000. His overtraining her without success doesn't mean she can't run fast, it simply means she can't run fast being overtrained. Wetmore would overtrain her in a different way than Salazar has.
The only way Cain gets back now is moderate mileage and setting intensity properly. It might feel like she is undertraining but in truth, what she was told could only help, was actually a long drawn out coaching error w some gaslighting thrown in for good measure.
The mere fact that Rowbury and Cain are both capable of