Let’s not add misinformation here. It was a panel of researches at the CDC that said the evidence for boosters for under 65 at risk individuals was marginal that the thought it wasn’t worth it. A similar panel of researches at the FDA said it was a close call but they said it was worth it. The CDC panel is advisory to the FDA panel, not the other way around. The debate here is specifically for under 65 at risk individuals.
Besides, the official recommendation was more on the line of "a 3rd dose is much less useful than applying those vaccines on the antivaxers". What is very clearly correct, but is of a laughable political naivety, because the preferred goal is practically impossible to reach.
