[PiggySpeed]

I have a running hypothesis on human behavior: people form self-serving opinions first and foremost, then scrounge around for the supporting evidence afterwards.

It is so hard for adults to admit they are wrong. Even harder if someone has been advocating for their own side at length. To change opinions, they need to have some acceptable exit strategy (e.g. "company A doesn't make vaccines with dangerous component X anymore, vaccines are safe now thank goodness!").