Carrying a gun for protection is a personal choice, so if you don't want to that's perfectly fine. The vast majority of people don't have carry permits. Even people with carry permits don't carry all of the time.

I think part of the problem is that if you're visiting a forum where carrying guns is being discussed, don't be surprised that people are going to be discussing the carrying of guns. It's like visiting a hot rod forum and being surprised that people are discussing the virtues of different cam shafts. Discussion forums for particular topics will often have members discussing the minutiae of those topics.

As for me, I carry whenever possible. It's not always possible. My workplaces prohibit guns. I visit the Post Office on occasion. Very rarely I'll travel by plane. Sometimes I go places where carry is prohibited. I don't obsess about it, though. I see my gun as one tool in a personal security toolbox. It's not my only tool.