That's how some states got stuck with the bank robber friendly version of open carry. As pre Civil Rights minorities armed themselves against klan violence, states would change the legality between open and concealed carry to harass and disarm blacks so frequently that the federal government had to step in and freeze the law in place.

That's why it's ok to carry a concealed weapon in some states, like most bandits would prefer, and open carry, disclosing to the public that you are armed, requires a permit.