People can't just pack up and leave because they disagree with their neighbors in real life, that takes money which not many people have a surplus of, especially in Alabama. That's not a choice.
Using Twitter is completely different, it costs nothing financially to stop going go a website. Your point about the social aspect and need for community is not wrong, but also if one values their social connections with fascists and fascist-enablers.. well.. I think you see where I'm going with that. That is a choice.