Some of the "Vaxxed and Done" voices that I hear on the WWW sounds like childfree adults telling parents that they should not worry. That is the perfect recipe for confrontation, even if unintentional! As a young adult, I would have happily tried to explain a rational, statistical/data-driven argument to parents. As a parent, I understand and accept a certain amount of irrational protectiveness/risk-aversion. It becomes very easy for us to talk past each other.