Since some people think that guns have a mind of their own, and merely having one risks a sudden onset of homicical rage with the gun jumping out of a holster and beginning shooting at old women and little children. Open carry means the gun doesn't have as much problem getting free of restraint and starting to kill people.
Personally I think open carry, if done by enough people in a locaation, can certainly have an effect in reducing the likelihood that a criminal would attempt to commit a crime. But if only a single person is open carrying, then the criminal might be tempted to just try to eliminate that person before beginning the planned crime. So even if open carry were legal, until I observed numerous others open carrying in public, I would continue to limit myself to concealed carry.
Personally I think open carry, if done by enough people in a locaation, can certainly have an effect in reducing the likelihood that a criminal would attempt to commit a crime. But if only a single person is open carrying, then the criminal might be tempted to just try to eliminate that person before beginning the planned crime. So even if open carry were legal, until I observed numerous others open carrying in public, I would continue to limit myself to concealed carry.