Well it's truly pretty rare that I block people, and maybe people do do that for things that they just disagree with, but I took it as the "block negative things out of your life."
Lots of crazy people on the internet, I just try to remember that sometimes I'm the one being smugly incorrect (and was that way up until like 25) so I can't get too mad at other people for it. It's why I heavily err on the side of caution, only when someone does the maga loop back to something they already agreed is false that I'm like ehhhh...