You do your part individually and that is the best you can do. All you are doing when you post something like this is causing a visceral reaction in the people that need to get vaccinated of "fuck you internet guy, I am not listening to you, I am not getting vaccinate!"
The people I know that are not vaccinated are this exactly. They are so pig headed that if you preach at them they will dig in their heals and do the opposite almost automatically. We need people to just shut up about this already and dial everything back so it is not some admission of defeat for pig headed people who haven't got the vaccine to actually do so.