That's not what anyone is suggesting, and it seems disingenuous for you to suggest that it is. The drug is well-known, and it's reasonable to attempt its use when there's the potential for a large success rate. The people "hoarding" it are doctors who can get prescriptions for it - and who I imagine know more about the drug than you or I do.
Based on the Ford study [1], the 10-50% success rate might be a confusion with the hazard ratio reduction, which was 66%. The actual in-hospital mortality rates in that study were 20% with hydroxychloroquine + azithromycin vs. 26% with neither. I'd say a 6 percentage point difference in lives saved is enough to warrant further investigation.
[1] https://www.ijidonline.com/article/S1201-9712(20)30534-8/ful...