Absolutely true, but the whole 'war on misinformation' has a very political, rather than scientific, feel to it. I spoke to some of my family members a few months into the pandemic about how science isn't some magical entity that instantly knows everything, but that's how it was being portrayed and most of the general public don't know any better. Good science takes time to reach the right conclusions, and shutting down dissenting voices in the name of science when the correct scientific conclusion is far from clear is the opposite of what science should stand for. I don't mind the authorities giving advice based on what they know now either, but don't turn into a tyrant over it.
Exactly, something some of the "follow the science" crew don't seem to grasp... The whole waiting for the evidence thing seems rather dumb when it comes to pandemics - it's "naive empiricism", you don't wait in the face of exponential growth, you need to act quickly based on incomplete information. This is why you saw people kicking off at the notion of extending the duration of the second dose of vaccine... "but but the trial was 4 weeks", it was a decision that was likely correct but based on incomplete information and fortunately we did act there and then later the evidence showed it was indeed the correct thing to have done.
Sadly though we delayed lockdowns in the UK because we were
waiting for the
right time to implement them and before that, we seemed to even briefly flirt with foregoing them and letting it spread/going for herd immunity via natural infections.
We didn't implement masking, not even basic cloth masks, because there wasn't sufficient evidence (at least according to mainstream views in the west) that masks work. Some people took this a step further and made flawed arguments that turned into actual claims that there wasn't just a lack of evidence but that masks don't work. There was a very naive GP who appeared on one of the morning talk shows and proceeded to shoot down the idea of travel restrictions, masks etc.. when a former model accurately cited the approaches some Asian countries were taking.
But did we really need random controlled trials to show that masks work... seems rather silly, likewise you don't need them to know air filters would be useful - those things are in the engineering domain. Some observational studies of the impact of these things sure but in terms of taking action, nope...
Lots of decisions re: the pandemic ultimately become political ones too, there isn't necessarily a "the science" answer to various policy questions but rather there are tradeoffs and positives/negatives to various approaches.