I find your arguments unconvincing. OC of holstered handguns has obviously helped gun rights. This is easily seen by subscribing to and reading regular email updates from NRA-ILA, handgunlaw.us, keepandbeararms.com, etc, etc. We've seen Ok, Ar, Al, Ms, and Ks (just to name a few) have debates about OC in their legislatures, have the representatives say it's a salubrious thing, and loosen their laws by either legalizing it or clarifying it is perfectly legal to OC. Normalization through desensitization is very effective no matter what the cause is. The anti-gun side sees this. California was/is a lost cause.
Regardless, you're allowed to be wrong. Further, I don't even care if every private business doesn't want to serve OCers. As long as you don't want state law to restrict OC, I have no quarrel with you.