I love how people bitch and moan, using the term "moving the goal posts" over something that is new and never happened before. The whole point of science is to test, measure and then react to the situation based on what data suggests. This is not specifically directed at the OP, but something that has been driving me nuts throughout the pandemic is the throwing of people under the bus who are working their asses off trying to squash the pandemic for not being Nostradamus. If you want to bitch about supply preparedness or vaccine rollouts, that's fair game; but trying to predict how a novel virus will behave, mutate, and affect every single human overnight, coupled with human behaviors is going to require some level of "goalpost moving". For the record, we still have no cures or 100% certainties for the flu, common cold, cancer and how they behave...those illnesses have been around forever. What a bunch of dumb asses we all are for not yet figuring those out. The human body is a mysterious thing!
If they had behaved as scientists and not as politicians, then they would get the benefit of the doubt that you wish to give them.
All good scientists (and Fauci is certainly not one) take a two pronged approach:
1. Use Occam's razor and go with the MOST LIKELY explanation that fits all the facts. Usually, this is the simplest one.
2. Make it clear that the explanation (or conclusion, or theory, or hypothesis or whatever words you like) is considered tentative and give an honest accounting for what are the weaknesses and strengths of the idea.
So, an honest broker (not Fauci) would have said wrt HCQ, Az, and Zinc: "Well, there's no harm, it's been used for 50 years now, so go ahead. But the evidence is only anecdotal, and while we're going to quickly perform double blind studies to determine the actual effectiveness of the treatment immediately, no one should be surprised if the results aren't perfect."
Had he done that, I would have said, "Well, here's a scientist, not a politician, and while there may be mistakes, I can trust him."
He did not do that, and that really cannot be disputed.
That's what a real, honest scientist would have said. Instead, he did the exact opposite, shut it down and don't look to see if it might work.
Imagine that - there was a ton of anecdotal evidence by lots of medical professionals, and HE NEVER EVEN LOOKED.
No, he doesn't get the benefit of the doubt.