It's sad that we have a piling on mentality here rather than looking at facts and the circumstances around it.
Your post about the parents is well said. Letting a teenage girl no matter her talent sign on with a group of seasoned professionals that have been through college systems ,experience different coaches grow up with the issues facing women runners helping them blend into a high end program like NOP.
Looking back Mary should have gone to college, got a couple of years under her belt, learned the sport by experience.
Reference back to a ESPN article April 26th 2013, she was hoping Salazar would call.
Note a press release from 2013: ( 17 year high school girl at this point)
"For the past couple of months, my family and I have been debating wether I should compete at a collegiate or professional level going forward. I have decided and am truly excited to announce I will be turning pro. I believe that, in the long run, this is the best way for me to continue to develop as an athlete"
Being pro is tough, you have declared yourself a professional athlete, it's not high school.
Young protege , emotionally fragile ,away from home 1st time, in tough disciplined environment in the end was not the best scenario for Mary.
She may not have got the kid glove treatment and clearly was not ready to be on her own, all should look in the mirror in the end.