It would be much easier to dispell that notion if the President of the United States hadnt gone on camera and said that very thing ("you can't get covid if you've been vaccinated")...iirc he repeated it just in case nobody heard it the first time. If anyone thinks he misspoke or didnt know what he was saying at the time, thats an even bigger issue, but a discussion for another thread. But at the same time, anyone who thumbs their nose at people for believing false info about covid obviously haven't been paying attention to all the conflicting/ever changing info, mixed messages etc being put out there by the most visible/influential people since this whole thing started.
Just look at the posts in this thread, there was a link to some website where they were suggesting that like 97% of people who got COVID were unvaccinated or something like that.
I just don't believe those numbers, but again I am sure they are doing everything they can to get as many people vaxxed as possible, it's just these little white lies make people question everything.