They'd have to have a reason. I'm sure there are many. For example, a person may have tried many treatments but then balked at one particular treatment. For whatever reason, they didn't want to have electroshock therapy. Maybe that might not be considered a sufficient reason, but they wouldn't be disqualified because they refused one of many treatments. The evaluation is a little more subtle than that, I would imagine.
On November 21st, 2023. See this statement in context.