alt Hacker News> Vaccines reduce the chance of them spreading it [..]
"Citation needed"...
Covid vaccination did not reliably or durably block SARS-CoV-2 transmission, especially after Omicron and as immunity waned.
https://pubmed.ncbi.nlm.nih.gov/39971395/
The overall VE [Vaccine Effectiveness] of the complete primary series against infection with any SARS-CoV-2 variant was 70.7%. VE was lower for Omicron, at 26.1%, than for pre-Omicron strains, at 77.0%. Over time, VE against infection by any variant decreased from 68.9% to 38.9% after 6 months.
Leaving aside the linked study is looking at vaccine effectiveness WRT infection rather than transmission, ...
Low effectiveness still agrees with the point made above about reducing chances of spread and transmission.
A reduction is still a reduction, even if is not a 100% total and full stop.