I understand your opinion; having actually coached college women for 20+ years, however, I can see why some coaches would disagree.
It's likely that some women would resent, maybe *keenly* resent, the attention that would necessarily be given to their teammate, particularly if that teammate were not the best runner on the squad. (Although their resenting the #1 runner also happens.) A poisonous atmosphere would be a genuine possibility.
I think you greatly overestimate any inspiration factor. I could be wrong; she could be a great fit for a particular team, and I hope she's a big plus at her college-to-be. All I'm saying is that I could completely understand, if coaches were wary. I suspect most people who've actually coached college women for some years would back me on that.
And, again, at many--I'm not saying all--programs that offer the NCAA max in women's scholarships, she would probably not be a scholarship candidate. Certainly not a full ride. [This doesn't even factor in that a coach's AD might refuse to take the kid, because of liability concerns.]
I answered the OP's question and gave some reasons why college coaches *might* not want Kayla on their team. I certainly wish her well, and hope that she and her team have a wonderful experience through the next four years.