I'm not sure what claim you're insisting this is supporting. The summary from your link is clear and seems to contradict your earlier point about boosters being

I'm not sure what claim you're insisting this is supporting. The summary from your link is clear and seems to contradict your earlier point about boosters being a no-brainer. Bivalent mRNA COVID-19 booster doses containing an Omicron BA.4/BA.5 sublineage component were recommended on September 1, 2022. The effectiveness of these updated vaccines against COVID-19–associated medical encounters has not been established.