Uhh, points at 2020
The CDC advising people to not buy masks in February because "they don't work" comes to mind. The US Gov in general completely letting businesses and individuals plunge into bankruptcy. I think a lot of people have been awakened to the fact that "the system" is pretty ambivalent to their personal well-being.
Scientists are people to. They don't magically know how a new never before seen virus works, instantly. It takes time to study it. Advice at the beginning are best guesses; some is going to turn out to be wrong. With time and experience, knowledge gets more firm, advice shifts and solidifies.
We're hardly at the "beginning". There have been very large trials to establish safety and efficacy. Sure its not like we have years of study, but its hardly the beginning. More like the middle.