Injured...Kinda:
For the each post I put here I was talking about an entering freshman, which is what the OP asked about.
In my first post I brought up one example, a runner who began at considerably less mileage than the girl the OP mentions, who progressed over 4 years so that this year she's run 50 mpw for an extended period. That's the same thing I brought up with my DI runners, who began their careers at very low mileage and have progressed into the 60s and 70s. It's not complicated: start at a reasonable number and add a little to it each year as they adapt successfully.
There's no contradiction there, so I'm not sure why you see one.
My point, and I'll make it again whether you like it or not, is that a freshman girl in general does NOT know her body yet, has NOT begun puberty, and is NOT ready to run heavy mileage. It sounded to me as if her coach is taking an intelligent approach to her freshman season and that she's running well if she can already run 18:49. Give her a few years and a successful travel through puberty and maybe she'll run a lot faster than she's run. Get her hurt now and yo might never know.
Arrogant you say? Nice work. You've got me pegged. But I've seen so many fools take advantage of prepubescent girls by running them into the ground, creating all kinds of problems for them and for their running and personal lives, that I don't really mind at all taking a rather extreme position.