More disinformation. The graph does not represent the entire set of people polled. The 23% of those (supposedly) with PhDs are a very small - perhaps around - 1% or as much as 5% or 10% - when one consideres the total number of people who fall into these categories:

In May, independent hesitancy risk factors included younger age, non-Asian race, having a PhD or ≤high school education, living in a rural county, living in a county with higher 2020 Trump support, lack of worry about COVID-19, working outside the home, never intentionally avoiding contact with others, and no past-year flu vaccine.