That isn’t why antivaxxers exist. Antivaxxers exist because they believe the vaccines themselves are poisonous or harmful as a core belief. Whether they believe the diseases are severe or exist is moot because that’s not what they have a problem with.

Many antivaxxers’ children do get severe disease and they do not change their stance because they genuinely believe the vaccines are so harmful.

It’s not that life is so good they are afraid, (doesn’t even make sense) but rather life is so bad and such a distrust in our medical system that they feel like they can’t risk what they see as a bad product.

Misunderstanding these people may make the problem simpler and may make you feel good about yourself, but it doesn’t do much to address their actual beliefs.