As much as I like to make fun of the US, in this particular case I have to point out that a lot of other countries have antivaxxers.

Here in France we have an epidemic of them, and the numbers shows they really made covid worse. My own dad is one of them, and he told me dead serious he'd rather get sick than get any vaccine and that's his choice and nobody should force him. He, and I guess most other antivax too, either does not understand the concept of herd immmunity or doesn't care about other people.