Why are you making assumptions for these people? I'm sure many of them understand the risks. They assume the risks. That's fine.
Vaccination does not eliminate transmission. If it did, the CDC wouldn't be recommending mask use now would it?
Because there are a lot of regret stories coming out, and more will continue to come.
No one ever claimed vaccines "eliminate" transmission. They don't. They reduce transmission, and the more people vaccinated within a community, the lower the transmission will be. Look at states where this is spreading the most right now. There is an incredibly strong correlation with the vaccination rate. That's not a coincidence.