No, there could be other reasons.
For example, does the Dr know how someone with a jacked up hemoglobin that is thought to have evolved because of malaria/mother nature will respond to an anti malaria drug that has serious side effects while the body is under assault from a novel virus.
It’s one thing if you are a deaths door.it’s another if you are rich socialite who is Doctor shopping in NY for someone who will presribe it because you have a mild fever...with no idea if you have Wuhan Flu