I don't really follow your logic.My view is that we have made very little progress with regard to a cure/treatment for covid. Almost weekly since this started there have been reports about some amazing result from this or that. Generally, those statements tend to be more wishful thinking, optimistic rhetoric and little scientific proof of success. They tend to fade into the background once they find out they really do not work as great as originally thought. Some people with covid get better on their own, so the fact they were given X and recover proves nothing. That is why clinical tests usually accepted study protocol are the only reliable way to determine if some treatment actually does anything.
When you say "some people with covid get better on their own so the fact they were given X and recover proves nothing" really that's just a strange comment to make. Or at least a strange comment to make about COVID but not about anything else. For example if I have a headache it'll get better on it own eventually it'll go away, but I take an ibuprofen anyways. The ibuprofen helped the headache though so that I felt better and quicker. I would have gotten better on my own as in the headache would have gone away eventually but does it really prove nothing that I took ibuprofen and it helped?
I do believe we are more selective in our treatments over time. We initially thought to get people on ventilators and there was this whole nation-wide search for them with auto makers even stepping in to make them. Then we discovered that ventilators shouldn't be used for everyone, shouldn't be used for long-term unless really really needed. Plasma from prior infected with COVID patients has been helpful to other patients, they are doing more research on this. A few days ago the NIH expanded their trials into this but there have been news stories for patients out there where plasma has been quite beneficial to them. Without this happening the trials may not even be there.
In terms of a novel situation such as this it really is trial and error. We've seen that some treatments do work, not all work for a larger subset of people without the ability to research this. We're only 6-7 months into this. Normally we might have more time to take a treatment for an existing issue and study it. We're having to do the opposite either discovering that something has an effect and expanding that to be used with other patients or trying different things out and hoping to have enough time to study this with other patients. What you want is something that usually happens when there's an existing issue and there's time to investigate s.l.o.w.l.y something. I don't think we can have it both ways with this virus. You either want doctors to be trying a variety of things to see if they work or you want them to go through potentially years worth of studies (because that's what it would take more than likely) on treatments.