For the vast majority of people that conceal carry a gun, the goal is still to be peaceful and avoid trouble. They just want to live life as they normally would with that extra training and capability. Some do it for personal reasons (stalkers, violent exes and so on) or because their area is generally sketchy. You usually don’t hear about them because on average they are responsible.

Open carry has a place, like on hikes in the woods for example. But people who open carry in public areas like restaurants are trying to make a statement. To everyone around them the vibe is “don’t mess with me…or else”. It draws tons of attention. People may take photos or alert security/police. And any bad actor knows exactly who to surprise and take out first. That’s why it is generally deemed as a bad idea and counterproductive