Some thoughts on this.
It's difficult, lacking experience, to understand how bad situations can happen, what is happening, how predatory criminals think/operate/plan. It's all too easy to get caught up in the imaginary world of movies and TV, where we have a team of military-style operators hitting a business, and think 'oh they're going to do this or that' (shoot the LACs with firearms). If you get caught up in that, if you get ambushed by superior firepower, superior experience, you are going to be lucky to get out alive.
When people with no experience are typing these blogs, I guarantee you they're thinking about TV and Movies, so -of course- they're going to warn those who are openly armed they'll be seen as targets.
Now days, even if you're trained up, you might be in condition white or yellow, but when someone is going to rob or take out a business they are going to by hyped up, in hot blood sometimes. Other times it's like the waffle house - they might look it over and see if there's a counter threat.
YOU NEVER KNOW. So to ruminate about things you can't control, to think about superior force ambushes as a 'reason' to arm up a particular way, is really a waste of time. Your imaginary scenario is not 'the scenario'.
What are your choices? Don't carry? Put a coat over it? In reality OC is an effective deterrent and if more people would do it, soon it would tip the scales.
I do wonder about some things - there are places where you are kind of exposed. In line to check out hunched over your shopping cart; in a store looking at a suit of clothes in the corner, back to the door. You can't always be assured you're not being crept up on. How do most OCDO OC-ers handle these?
My solution is to, as much as possible, partner up. I think it gives you about 10x the SA potential than you might have as a single carrier. You are watching each others' backs.