They don't seem logical, because there isn't any logical reason to avoid getting vaccinated, beyond the allergic or immuno-compromised portion of the population. It's a very tribal mindset and if you want to maintain those tribal bona fides, well, you must adopt that mindset.
It's like sharing fake news - you know, deep down, that it's fake. But, that isn't the point. The point is that it is in keeping with a world view common to your cohort.
A lot of no-vaxxers say they distrust the media, drug companies, the government, etc. but a lot of these same people apparently believe all sorts of wacky stuff from sources that are at best highly dubious. Perhaps, as you suggested, they know deep down it's fake but they "believe" it at some level because it's consistent with their world view.
The school in Miami that barred contact between vaccinated teachers and students is apparently holding firm on their wacky theories. It's unclear to me if the people who run the school actually believe that standing next to a vaccinated person can cause miscarriages. My initial impression was that it must be a political stunt (a retaliation of sorts). Who knows, perhaps they honestly believe it. At some point, attempting to understand this sort of thinking becomes tiresome.
>>>MIAMI -- A private school founded by an anti-vaccination activist in South Florida has warned teachers and staff against taking the COVID-19 vaccine, saying it will not employ anyone who has received the shot.
The Centner Academy in Miami sent a notice to parents on Monday informing them of a new policy for its two campuses for about 300 students from pre-kindergarten through eighth grade. Teachers or staff who have already taken the vaccine were told to continue reporting to school but to stay separated from students. . . .
Centner stood by the decision Tuesday in a statement sent to The Associated Press, which featured the biologically impossible claim that unvaccinated women have experienced miscarriages and other reproductive problems just by standing in proximity to vaccinated people. . . .
Earlier this month, Centner criticized measures by the CDC to curb the spread of the virus, and said her school went against the guidelines from the moment it reopened in September.
"We did not follow any of the tyrannic measures that were in place. I did not force our kids to wear a mask," Centner said while attending a "Health and Freedom" rally for a Republican candidate that featured supporters of former President Donald Trump and critics of public health restrictions in Tulsa, Oklahoma. <<<
The school founded by an anti-vaccination activist has warned teachers and staff against taking the COVID vaccine.
abc7.com
>>>MIAMI — A fifth-grade math and science teacher peddled a
bogus conspiracy theory on Wednesday to students at Centner Academy, a private school in Miami, warning them that they should not hug parents who had been vaccinated against the coronavirus for more than five seconds because they might be exposed to harmful vaccine shedding.<<<
Centner Academy barred teachers newly vaccinated against the coronavirus from being near students. Some parents threatened to withdraw their children. Others clamored to enroll.
www.nytimes.com