Before social media, you'd watch the news, radio etc with your family, people in your community and workplace, as a group it probably made sense to agree to getting vaccinated.
In 2021 its "my choice", to not do x and to y.
In 2021 people come primed to a discussion or a decision with a huge artillery of "facts" they've spent time being recommended by algorithms.
This seems to be unique and unparalleled in history.