This is exactly it. Anti-maskers/anti-restrictionists seized on the stupidity of our early mask policy (and subsequent flip-flop to sanity) as evidence that restriction policy isn't in the interests of public health, but just a power grab by elites. Denying that this ever happened lets their simpleton counterparts stick to a simple narrative, where masks have always and obviously been a good idea and any deviation from the maximalist consensus needs to be crushed without any equivocation or weakness.[1]
By contrast, the "war" right now is against vaccine hesitancy[2]. There are no Trumpists or other hated subcultures that are gung-ho on vaccines, so the J&J pause is interpreted simply as "scaring people away from vaccines" during a time when we need vaccines (this is unfortunately correct[3])
For a person infected with tribal-brain, consistency with reality is more or less irrelevant. HN is heavily-populated or at least influenced by subcultures (Bay Area, tech) that have been religiously adherent to the appearance of compliance and performative self-abnegation as a response to the pandemic (like a milder version of the Flagellants during the Black Death).
[1] Hence also the ritualistic obsession with masking in places where it isn't necessary. My girlfriend gets uncomfortable that I often take my mask off outdoors when we're walking around, despite it being clear for almost a year that there's minimal risk from doing so, especially when walking swiftly (on top of that, we're both fully-vaccinated). She acknowledges this is irrational, but it's not too difficult to try to meet her in the middle and so I keep it on more often than I'd like.
[2] Fascinatingly, US vaccine willingness now polls at ~61% while % vaccinated is 55%. We're effectively in the phase where demand is the challenge.
[3] https://mobile.twitter.com/FT__Dan/status/138753181546475110...
Spot on. Some people like following rules, and lording their compliance over others. None of this precludes the goodness of following pandemic rules, however.
Regarding 2, hopefully restrictions introduced by airlines, clubs, sporting events, theme parks, etc. will push anybody on the fence to get a vaccine over the coming months. Once things really start to open up I imagine FOMO can be a real driver.
I don't think anti-mask is a popular sentiment on HN, so I doubt that is driving the vote. But this isn't the first time I've seen downvotes on this topic. And it's not like HN loves authority or the biomedical research establishment in general.