Since the beginning of the pandemic, I've noticed lots of people, including Bitcoiners, be against vaccines, quarantine, Covid in general.
You've answered your own question here. There are plenty of anti-vax morons and conspiracy quacks around. The cryptocurrency community is large enough that it will have roughly the same proportion of morons and quacks as the general population.
Being technically competent in one field does not preclude you from being a moron in another field. Being technically knowledge on bitcoin or cryptography does not make you a virologist or epidemiologist.