I shouldn't have to tell you why a individual had to carry a gun back then.
Maybe if you live out in bumfuck egypt, open carry is fine. Here in the city, that is WAY out of the norm. If you think there isn't a difference between now and the 1800s, go strap a unloaded pistol to your side and take a stroll through the Universal City Walk on a Friday night. See how things go for you.
I would like you to answer the question. The reasons for carrying haven't changed, only people's delusions of security.
An no, I'm not going to strap an unloaded pistol to my side, because I'm located in one of the 42 states that have open carry. Might I also add, we haven't seen any wild west scenarios play out in any states with such a legislation. Your emotional response means nothing to me, the truth is open carry doesn't create more crime
What you fail to understand is there are plenty of occupations where open carry is needed. Process servers, repomen, animal control, bail bondsmen, etc. Does everyone in these occupations carry? No. Should they be able to? Yes.
Just because YOU don't have a reason to carry doesn't mean no one else should be able to.