Again, "beating the experts one time" does not mean that betting against them is a good bet. For every person that fits your description there are a hundred not getting vaccinated because they've "done their research". The literal comment right below mine is some anti-vax nonsense right here on HN, in a community that is overwhelmingly better-educated than the public at large.
I agree that going with the experts is the best course of action for the general public. We need to be able to disagree with experts, but we need to be able to do it in an informed manner, with proper research to back up the ideas. However, most of the general public is unable to do so.
"And given that that's the case, now when we're talking about vaccinated people being indoors in settings where you don't know what the status is, particularly in an area, as you mentioned correctly, that has a high degree of protection, the recommendation is that you wear a mask even indoors, even if you're vaccinated."
The only thing that changed was that people were vaccinated en masse and the virus had become even more transmissible. So that whatever infinitesimal effect the mask had before, against the delta variant it was now beyond useless.
I could sit here all day and list more and more deliberate falsehoods, but they're well-documented and no serious person denies that there was extensive lying by experts for political and social purposes under the guise of dispassionately relaying the most credible and up-to-date medical information.