Hey, I came across this post with the #guidance tag, and just thought you would find something interesting:

We don't know from this email what low risk environment Sylvia was going to, but that factors in to the recommendation to not wear a mask. "I'm going to dine indoors with poor ventilation for several hours while listening to a series of open mic participants from close to the stage" may have been met with a different recommendation.

I understand your evaluation that this was an error in a mix of your 1) and 3). You may be interested that in fact, there may be a little bit of 2) involved as well: The 60-Year-Old Scientific Screwup That Helped Covid Kill

In truth, this might actually fall under 3) as well. At any rate, I thought you would find it informative.

Cheers.