There are actual reasons for people to open carry a gun. Main goal is to normalize it. Where I live a lot of people open carry, and it's no big deal, no one really cares or notices.
My neighbor moved here from California though, and she was initially terrified every time she saw someone carrying a gun here. But after awhile she got used to it as well. I haven't asked her what her current opinion is on guns, but I know she went from terrified to not caring, which would be considered a positive change from the people who are open carrying around town.
That said, I don't get the impression that most people who open carry are doing it for that reason, usually seems like it more because they want to show off.