For full disclosure I don't vaccinate anymore (waiting until the mucosal vaccines are available). But I understand those who do, especially if they are around other people when maskless more than I am.
Here's a much older article about the original omicron (quite distinct from the BA.2 descendants we have now): https://www.cdc.gov/mmwr/volumes/71/wr/mm7109e1.htm
> The ARs among household contacts of index patients who had received a COVID-19 booster dose, of fully vaccinated index patients who completed their COVID-19 primary series within the previous 5 months, and of unvaccinated index patients were 42.7% (47 of 110), 43.6% (17 of 39), and 63.9% (69 of 108), respectively.
Basically this article doesn't show that vaccines prevent transmission. It doesn't show they don't either, although that there wasn't a more dramatic effect is a negative finding in my opinion. I wish the authors had analyzes the AR in vaccinated vs unvaccinated household contacts.