Once again, with link:
This article speculates that in addition to people that don’t want the vaccine, there also significant numbers of disinterested, low information, or just otherwise busy people; who would take it, if it was easier.
https://www.statnews.com/2021/04/27/vaccinations-are-plateauing-dont-blame-it-on-resistance/
At some point, I would guess we’ll see mobile vaccination units meeting people where they are and doing vaccinations on demand.
Also, a lot of the busy people will be fine doing it when they’re able to just walk into Walgreens and get it any time without any waiting or appointment. The actual number who will refuse it no matter what are tiny.