Some really good points I hadn’t considered there.

I think it’s important that the medical professionals do not use such terminology and instead try to be as neutral as possible, e.g. “coping with” or “receiving treatment for”. If a patient wants to say they’re fighting cancer, that’s up to the patient. For some it might help them feel like they have a bit of control over a situation where they’re powerless, for others it might make it worse.