CDC which stands for Centers for Disease Controls is made up of medical professionals to include scientists. Politics is an excuse of some not to wear a mask. Some are also poo-pooing or turning into Karens to test the " No mask No service " by going in unmasked.That's not science, that's a prudential political decision.
"Here's what we know, here's what we think, and here's what we don't know" is science. "Here's what we should do about it" is not science.