It's probably that PREP act thing. Legal liability shield is more important saving people, again it's all about the money.

Most doctors are captives of corporate medical.
Corporate medical is owned by the same people that own pharma.
No money in cures.
Just managing long drawn out diseases with office visits and meds.

Only independent doctors actually prescribe off label.
Neighbor lady has doctor script for Ivermectin, CVS won't fill it.