Agreed on the test itself. I'm making a larger point their role as the preeminent public health organization in the county. They were neutered in that role since March by the administration.
It is my opinion that Fauci said no masks early on because we didn't understand how much asymptomatic transmission there was at the time and that the data on the effectiveness of public masking was quite flimsy at the time. That it isn't exactly a flip flop since what we didn't understand at the time that public masking was effective. Since, there have been some, albeit not perfect studies, that have shown some effectiveness. They aren't the golden goose, but they should be warn and used as part of an overall public health strategy.
I just don't think what Fauci said in March matters that much about what is going on now. The anti-masking stuff is political theater. It's not genuine scientific confusion.