Just curious, but why do you think you need an optic for a concealed carry, aside from the standard front blade and rear notch? Most any armed confrontation you might have would be well within an effective range of the "irons"; and closer in, practiced instinctive shooting would negate the need to waste time aiming at all in a defensive situation. Plus, raised optics require holsters made to hold a gun so equipped, and make concealment more difficult.
I would have thought the same myself a few months ago, I was skeptical about a dot on a handgun.
On a couple of other gun forums I saw threads advocating red dots on handguns.
This person is fast, they said that they saw the dot, were using the dot in this drill:
I was concerned about speed with a dot inside 10 yards, that example resolved the speed question for me.
I decided to give the dot a try; I usually carried a Glock 17 or 34 already, the 34 was MOS so it got the dot.
Initially I was noticeably slower with the dot than fixed sights, which I read was typical for someone who has used fixed sights for decades.
I decided to be patient and give it several range sessions.
After a few subsequent trips to the range and about 600 rounds, my dot speed is close enough to fixed that I'm carrying the dot.
Why?
Whether I carried it or not, the dot cleaned up (tweaked) my draw; if I draw correctly the dot is visible, same applies to fixed sights being on target.
Specific to the dot, it is advantageous for accuracy as distance increases past 10 yards or more; at 25 yards, the dot is definitely advantageous.
Most SD may not occur past 7 yards, but across a church, store, parking lot, the potential is there and there is no denying the benefit of accuracy.
Also, I'm a bit nearsighted; my glasses fuzz front sights, but make the dot clear (which is a bit fuzzed without my glasses).
With fixed sights, I focus on the front sight (if I want to be accurate); with the dot more of my focus can be on the target, an advantage.
The holster I was already using for the 17/34 was compatible with a dot so I didn't need a different holster and its no harder to conceal AIWB.
I'm not trying to convince you to carry a dot but just explain why (for me), which is a question I was pondering myself a few months ago.