Actually, this is an area where I would criticize the CDC, though I understand why they did what they did. The first thing is that the US was desperately short on N95 masks, and not even medical staff who were treating Covid patients had reliable access to masks. Public health authorities were afraid of a run on masks (which happened anyways), which would make that situation even worse. The government should have explained the situation to people, appealed to their civic duty (which probably wouldn't work in the US), and taken emergency measures like commandeering stocks of N95 masks from retailers.
The other aspect of this, which one could see as "bad science," was that various studies had found that laypeople don't know how to wear masks properly, so their real-world effectiveness was in doubt. I think the correct response to that is to teach people how to wear them, not to say they don't work. But before the pandemic, there was genuinely dispute in the literature about what the best mask recommendation in a flu pandemic (which was what everyone was planning for) would be.
> Initial studies did not test for transmission.
Initial studies tested for signs of infection. If your chance of getting infected is dramatically reduced (which it was in the first few months after vaccination), then of course you are less likely to transmit the virus. If you don't get infected, you don't transmit.
> Yes, schools are often centers of viral spread — but this was never the case for Covid. Good science requires evidence before jumping to conclusions, not merely relying on what has “long been known”.
It absolutely was the case for Covid, as it is for pretty much every respiratory disease on Earth. In the middle of a pandemic, you don't have time to run a months-long study with thousands of children to determine if schools are centers of transmission. The virus spreads by people breathing near one another. A room full of children running around slobbering on each other is obviously going to be a perfect environment for the virus to spread. One parent gets sick. Their child gets sick. Then all the children get sick. Then all the parents get sick. It's like clockwork, as anyone who has children knows. Waiting for all the studies to come in to confirm the obvious in the middle of a pandemic would be completely irresponsible.
> I think that Americans just hate being told what to do, and when there isn’t really justification for it (I.e. the bad science), they’re gonna do the opposite. The lesson shouldn’t be that people are dumb, it should be that trying to force half-baked policies down everyone’s throats will backfire.
As opposed to what? Telling people not to vaccinate and not to mask? The issue of masks and vaccines were incredibly politicized in the US, and there were all sorts of people cynically using these issues to appear anti-establishment. The US has a long history of paranoid-style politics, and in a pandemic, that's basically poison.