If it is judging by example of my wife's parents... No I am not going to say it, if you think there is any remnants of a feeling in you that you can do or say something to change their mind, please do friend...

In case of my wife's parents, we talked and advised, and they dropped it that day... Then they came back with it, asking us how to do it... We talked again and told them everything... we ask them questions, to which they did not have answers and agreed it was illogical how that whole thing is... They dropped it again.... The next time they called so we can help them book a meeting... Now we are annoyed, but still talking to them telling them everything all over again, saying that we cannot help them with that in good conscience and if they are bent of doing it, they will have to find somebody else... They dropped it.... The next day the called to ask us the same thing again, telling us they know how we feel about it, but they just so happens to have it opened on their computer, and need help to book an appointment.... Wife is shaking at this point, loosing words, feeling like talking to a wall... The next time they called to tell us with a smile and relief that "there, they are safe now"... And then they booked a 2nd one... The next time we saw them, they wanted to discuss stupid people who do not wear masks and I got pissed, I got up and told them that it is well enough that they forced us to deal with any potential consequences that might come from their stupid decisions, and that it took as a lot of soul searching to cope with that, I told them that if they are going to insist living in that world, I am not going to be a part of it, and we are going to leave. They did not mention anything about it since, they are afraid of me getting like that again... We are still visiting them of course, they stay away from the subject, and we get along well. We painfully learn that we cannot compete with the TV that is a bigger influence on their decisions than their own children or even own life experience...