That's not contradictory, it's just math with very large numbers and the impact to even small percentages.Kind of like "the vaccines work so well that the unvaccinated need to get vaccinated to protect the people who have been vaccinated." There are lots of contradictory statements flying around regarding COVID vaccines.
The vaccines have never worked so well that they were a force field of protection. They were never sold that way by anyone either.
Side note, scheduled my booster, as I got the J&J. Getting Pfizer this time, and a flu shot in like 2 hours. For the J&J, the booster is a much easier decision. It was probably always a 2 dose vaccine, like many other vaccines. They just happened to lock in on the single dose because the results were "good enough" and there was lots of value attached to having a 1 dose vaccine. Same reason they're calling it a booster now and not just a second dose, it's more marketing driven. It's more fuzzy with the others if they're more like 3 dose vaccines, or maybe the second dose should have been further apart and 2 would have been fine. It may just be that the second doses were to fast for the best outcome, but that it's still "good enough". I picked Pfizer for the second as it was the easiest to schedule, it's harder to find another J&J. The Pfizer and Flu appointment was available for 3 hours from the time I started to make it and just down the street. As a split vaccine brand household, I'm the only one getting a booster now.