That's an extremely privileged take. Not everyone knows about what an MRI does. Don't just judge someone's education and circumstance like that.
Common sense is that a person should be able to trust the medical professional. If the professional doesn't properly warn them, how would they know?
This was part of the other article I linked. It's a lot of "they said she said" but I'm gonna put more faith in the victim's word and not the clinic's.