I think “being statistically unlikely of a negative outcome” is the wrong argument though. That argument can be made regarding COVID-19 as well as the vaccines

I think “being statistically unlikely of a negative outcome” is the wrong argument though. That argument can be made regarding COVID-19 as well as the vaccines, particularly among the largest age demographic currently expressing vaccine hesitation. They are statistically unlikely to die from Covid too. The best thing to do at least in the US is for the FDA to fully approve the vaccine, both for adults and for children. I suspect you will always have 10-15% that are vaccine holdouts no matter what, but until there is full FDA approval, you will never ever reach 70-75%.