I just watched the most recent Last Week Tonight, and there was a clip of a man whose mother refused the vaccine, caught COVID, and is now in the ICU on a ventilator. He was asked if he was going to get vaccinated, and he said he still wasn't sure.

I really wish that stick worked, but it seems like it won't, at least not universally. But presumably there are some people for whom it will work, if one of their loved ones gets infected and ends up in a bad way.