As I mentioned in another comment, the President of the United States literally said that if you take the vaccine, you won't get Covid, verbatim.
To your broader point - I think skepticism about the efficacy of the Covid vaccine is a very different (and rapidly evolving) thing than traditional anti-vaxx rhetoric.
If you don't think public trust has declined - why did fewer than 50% of people who got 2 doses go on to get a booster? What changed for them?