The problem is that the CDC presented things as fact, without any communication of uncertainty, so their change in stance was perceived as a change is stance, rather than some smooth approach to an "understanding". This was made worse by the fact that health experts (or anyone) who voiced these uncertainties, concerns, or pointed out the flaws/needed changes were silenced and bullied on social media, even if time proved that they were right. The tribalism was/is insane.

The communication from the US government was terrible, especially compared to other countries who's health leaders don't assume their populace are idiots.