I understand how a vaccine works .... I don't think its as clear as people seem to suggest that its not being spread around .......... you only know what you findAny vaccination, like every other medical intervention isn't perfect, some less than others obviously. Where this kind of statement is poorly rooted in fact, is that it's attempting to deal in absolutes, rather than degrees. The basis being you can contract the virus, and then pass it on despite being vaccinated, ergo being vaccinated only protects the individual that is vaccinated.
That's simply not the case though, and is a misrepresentation of how vaccination works, it doesn't eradicate the risk of disease, it lessens it. In order to eradicate the disease from a community, you need enough folks vaxxed so as to reduce the risk of infection to the point where anyone who contracts the disease isn't passing it on to enough folk for it to grow in prevalence. At some point, depending on the efficacy of the vax it's self, and the number of folks vaccinated, prevalence will drop in accordance with risk.
If vaccination rates aren't high enough in relation to efficacy, then the disease will continue to spread ( all else being equal ) This is where we are now.
If you stop and think about exactly how a vaccine "works", you can easily see the the flaws in these kind of arguments. Vaccines create "memory" in your immune system in order for it to be able to deal with a virus if it detects it in your system. In other words, for a vaccine to do what it does ( deal with a disease ) it must detect the virus in your system, and in order for there to be a virus to detect, there must be transmission of that virus.