Oh, this is really funny.
So, what's your beef? If the criminal attacks, you respond. Irrelevant if you cc or oc. If they don't notice, makes no difference then. You have to be ready to act, irregardless. You are responsible for you, and smart people don't make decisions completely on the "hope" of someone else's response in any case. Carrying openly is a matter of preference, convenience, principle and sometimes opportunity.
But the fact is that seeing a gun on a potential victim really does make a difference, however or whenever they see it - usually resulting in no need to draw it. I'm living proof. And the "living" part of that is important.
Carry as you will. No skin off my nose.