The points is that back in September we were ready to declare success with a vaccine that was 50% effective. Fingers crossed we'd see 75%. Instead, it turned out to be 94% effective against the original Mark 1 Mod 0 virus. Woohoo! And that wasn't an "advertisement, that was the result of a clinical trial.Who cares if the CDC said it? The point they’re making is that the vaccine was advertised to be over 90% effective.
It remains better than 50% against the latest variants, which is remarkable, but of course isn't still 90%. Are people too stupid to understand a vaccine designed for the original virus might not be as good against the new one, but can still be as effective as originally hoped?