I'm sorry if but I'm having a difficult time figuring out what I have said that you disagreed with.
You don't seem to be taking people's statements at face value, but rather projecting additional meaning onto them, almost as if you conceive of fewer possible positions than there actually are, and pigeonhole us.
Consider my prior two statements in this thread which start with "the fact" and "you were". Do you agree that these statements were correct, on their own terms, in their own context, and independent of additional complexities involving degree if efficacy or various arguments for or against use, testing, or hopefulness?
Also, do you see that the people who disagree with your framing are not 'picking nits' nor are they having 'struck nerves'? Can you see other reasons why they might respond as they did?
Why? I'm modeling the doctors and health officials who are making these decisions as agents which are presumably continuously evaluating their decisions. So basically:
A lot of experts are taking this action -> assume the action has a desirable outcome -> believe what the experts are saying (in this case both their words and their actions seem to agree with each other, and point to the idea that chloroquine is an effective treatment of covid-19).
I am genuinely at a loss as to why this stance (my stance) is anything other than completely obvious.