Decent argument, but you were dodging the point we illustrated -
NOP/Salazar are doing ANYTHING legitimate to enhance performance and get their runners to the top - optimizing weight is one part of it (they might and probably do also do more than legitimate things, but that's irrelevant for this discussion).
They did it with Hassan - she lost a LOT of weight since joining NOP, which was a huge part in dropping times and becoming the best in the world - it worked!
They keep Koko at the same low, unhealthy(?) weight with a ridiculous 15.x BMI. She keeps getting better and better, broke several German records in solo TT races without pacers, medaled in Doha and is a strong canditate for an Olympic medal in Tokyo - it works/worked!
They did exactly the same with Cain, who in terms of age might have been a slightly bit younger, but in terms of body development was just as mature as the other runners. It did NOT work, she got injured, frustrated, burned out, and started to hate running.
This is not any different than the average HS/college coach throwing super hard intensity/high mileage program on their top 20 runners, and hoping that 5-7 of them survive and run top times in HS/college. They don't care about the athlete or what happens later, they just want to have optimal performance whenever it matters the most for them.
What may have changed from the days of Mary Cain is that NOP/Salazar/Nike medical found away to keep (most of) their runners at an extremely low weight/BMI that would definitely get injured 95% of female runners and stay healthy. Cain was just another test subject for Salazar (not intended to be, but he learned from the experience with her and might have tried different methods/drugs with his newer runners to lose/keep weight low).