The knights just totally did not comprehend, like I said.
But, it looks like the king does, now.
Now that he realizes the end result that she seeks in her training, what she truly desires her trainees to become, including the personality she hopes for, he may be a bit less reluctant to turn over those with the healing gift to her for training.
One hopes he's still reluctant, however, as it is a brutal regimen, and if you aren't the right type of person, it could really do a number on you.
Worse, would be if someone with precisely the wrong type of personality were to complete her training.
But, yeah, Rose is doing what she's doing for all the right reasons.