If we can shorten and simplify this discussion.
No one claims there is clear evidence that Hydroxychloroquine works.
Medicine in general is based on clear data/evidence.
Even Dr. Z. Said that all he has is anecdotal observations.
He agrees that this does not meet the standard for medical treatment protocols, but is making the argument that these are unusual times and his anecdotal observations should be accepted.
Some primary care physicians are prescribing it even out if hospital, some asking that the patients get an ekg before starting the meds, as well as after day 1.