This is a strawman argument. The OP proposed that on average whites are more vaccinated than blacks, which your citation supports. So vaccine marketing should target the biggest vaccine skeptics, otherwise the racially inequal outcomes will only grow.
B) There are more white people in America than black people. So, while in relative terms there may be less vaccinated black than white people, in absolute terms, there are more unvaccinated white than black people.
The vaccines don't care about the proportion of various demographic groups. The community benefits from there being more vaccinated people overall.
Careful, you might pull something with those mental gymnastics.
You’re right that more vaccinated people is what matters so everyone should do their part. That means per capita should be the same across all demographics. Any group that has a lower per capita is dragging covid progress, regardless of how large or small the group is.
However, if you look at the cross tabs of opinion polling, supporters of a particular party are much more hesitant to get the vaccine.