It reminds me of the movie "Dogma" from a few years back... it's the difference between ideas and beliefs. When I started carrying, I was in Texas and I had no option about whether or not I had to conceal all the time. So when I moved up here to Colorado for grad school, the choice that I could carry openly when it was hot, when I didn't feel like wearing baggy pants or a waist pack or an overshirt, was a great idea. I could conceal to keep my pistol dry in the rain, or I could wear it out to keep it away from sweat on a hot day.
But there are people who become obsessed with the "strategy" of a potential encounter, or are utterly convinced that the closest SWAT team is going to throw them to the pavement the moment the outline of their hilt becomes gleanable under their shirts... then, it becomes a question of belief and not idea. Once they believe the way they do it is correct, then it's like religion: everyone else is wrong and all levels of extreme behavior becomes permissible. I mean, there's little more madness than when people who are supposedly working towards a common goal fighting amongst themselves for no good reason. Both sides of the argument want it to be legal and moreover accepted that law-abiding people carry guns in a civil manner in day-to-day life, so why some would then say "if you don't conceal it, you shouldn't be carrying it" is totally lost on me.
I've come up only a couple of people in my years of carrying who made it personal or got into a true argument that concealing was the only way to carry a gun in the modern age. One, a gun shop owner who was OCing himself at the time behind the counter, called me a "goddamned moron with a death wish" for doing it... I responded with a wide, sarcastic shocked face and said, "Oh my God! Thank you for telling me, I had no idea! I mean, I always thought because I'm working on my PhD that I was smart, but I was wrong! I'm going to get on the phone right now with my adviser and tell him to throw me out of the program... maybe I can transfer to a group home where I belong!" That shut him up quick for the moment (and was more vain on my part than it should've been in the name of civility), but I find that people in the wider world are a bit more reasonable than the Internet Heroes of PDO or Glocktalk... I read both each day to keep in tune with as much news around the country as possible, but I long ago gave up trying to reason with people who believe and don't think.
My two denarii.