If you are carrying period, that is pretty much your primary focus.
The deterrent value of a group of openly armed people is pretty damn obvious. Arguing the point is silly.
If people only carried when carrying was their primary focus, there would be very few people carrying. Most people head out of the house every day to focus on their jobs, errands, a sports contest or theatre performance they’re attending, etc. Carrying is secondary, like taking your wallet with you — you make sure you’ve got the gun and the wallet when you leave the house, and you make sure you don’t lose them while you’re out, but your primary focus is on whatever you left the house to do.