Number 7 is not really the full truth: Dexamethasone is the first drug in a random trial shown to save some Covid-19 patient lives in the second autoimmune phase of the disease. It's actually very dangerous to give to patients in the first viral-replication phase. But it (like other steroids) and anticoagulants have been shown to save those poor souls who go into cytokine storm. It's just that the other steroids and heparin have not had random trials. Most doctors considered steroid treatment obvious when patients showed several inflammation markers in their blood, and anticoagulants like heparin obvious when they showed a lot of coagulation markers in their blood.
Does that mean we need random trials for heparin, when patients have very high clotting markers in their blood and autopsies of victims show little clots in all the capillaries? Sometimes random trials are just not necessary and would kill a lot of the control arm subjects for no reason. This is why there is a "standard of care": So doctors don't have to prove every drug they use is useful against a particular disease with a random trial.