Here's the authoritative guidance on the rollout: https://stacks.cdc.gov/view/cdc/103787/cdc_103787_DS1.pdf
What gives you the idea that a low-risk person opting not to get the vaccine is "at odds with authoritative guidance?" Yes, I would bet that it made you feel like a leper, but that's because people (correctly) think that it signals something about your attitude toward the rest of society. Not sure that can be pinned on public health authorities. People who hold open the door to the cold are assholes and frequently treated as such.
Here's the guidance on whether vaccinated people with sniffles should go out in public: https://stacks.cdc.gov/view/cdc/105629
Answer: no. Go get tested, and if positive, don't gather.
Yes, agreed that people were listening primarily to a game of telephone and vibes and not actually reading any of the linked PDFs or listening to the actual words spoken by actual public health officials firsthand, and then they (like you are now) were confused about what the actual guidance said.