Well, humans aren't necessarily logical and consistent, are they? Obviously you don't see the people who are isolating at home trying to avoid this virus, because well, they're at home and not out and about being judged by you. What if they know that the people they're dining with are healthy, vaccinated (less chances of catching the virus and being infectious) and/or were recently tested?
Aren't the people who defiantly enter places with mask mandates without their masks also signalling their virtue of being "free thinkers" and "not a government sheeple"? But if I can guess, that's OK for you because they're the ones doing the right thing.
I'd tell you you suffer from confirmation bias, but hey, I guess you've heard that too. But no! You're right and everyone else are morons!