Exactly, and this "100% or else what science and medicine say is bullshit" type of argument is at the core of a lot of the bad faith arguments that we are seeing now:
"Oh, someone who was vaccinated got COVID, the vaccine doesn't provide 100% protection from infection, checkmate, vax lovers" - look at the breakdowns of vaccinated/unvaccinated in pretty much any metric: new infections, sympomatic infections, hospitalizations, ICU populations, deaths. They all point to an incredibly obvious conclusion, unless you're intentionally trying to miss it.
"Oh but getting COVID doesn't mean I have a 100% chance of dying or even getting seriously ill, I don't need a vaccine" - great, just turn yourself into a COVID distribution vehicle and an incubator for new variants.
"A mask doesn't block 100% of transmission, so why bother" (or the even better "masks do more harm than good", what a load of bullshit)
These arguments are just not logically sound, and when they're put forth by people who should (and do) know better, they are actively harmful.