The primary two reasons for open carry involve deterrence and ease of access.
Deterrence is based on a bad guy being able to see that you're carrying. That's acceptable only if you're able to respond without delay. Despite the blitheringly idiotic claim of some morons that they can draw and fire from beneath layers of clothing as rapidly as others can from an unfettered firearm, everyone with half a brain has experienced the contrary, that CC induces at least some additional delay.
Thus, the question becomes, "would I still advertise, knowing that I was operating from a limitation which the bad guy might not have?"
My answer is, "Absolutely not."