Earlier quoted context omitted.
Those killed in the story didn’t go to the party. As well as those who died, some number will have long term disability and illness. Many of them won’t have been guests at the wedding.
They still made choices to get in close contact with people who did go to the party, without having vetted them sufficiently. I'm not saying it's easy to avoid such choices, but even things like going out to buy food - how many layers of mask are you wearing? What hours do you go shopping? How many months of food do you have stored at your home (inb4 "survivalists are just paranoid")?
Some (all?) of the fatalities were rest home patients and many who caught it were prison inmates. They didn’t get to make any choices about who they saw or who cared for them.